Homeostasis refers to the body's ability to maintain a constant internal environment despite changing external conditions. The document discusses various mechanisms that help regulate body temperature, including negative feedback loops, sweating, vasodilation, shivering, and changes in metabolism. When the body gets too hot, sweating and increased blood flow to the skin help cool it down. When cold, vasoconstriction and shivering generate heat while decreasing blood flow to the skin. Together these processes help keep the internal temperature within a narrow range to allow for optimal chemical reactions in cells.
The document discusses several biological processes related to homeostasis, including thermoregulation, osmoregulation, excretion, and feedback mechanisms. Thermoregulation involves various systems working to maintain steady body temperature through processes like evaporative cooling and heat shock proteins in plants. Osmoregulation requires adaptations for water balance in land animals like waxy skins and drinking moist foods, while plants employ strategies like thick, waxy leaves and positioning stomata. Excretion eliminates waste through various routes in both plants like shedding leaves and animals like sweating, breathing, and urinating. Feedback mechanisms can be negative, counteracting changes, or positive, increasing changes away from set points to enable rapid responses.
1. The document discusses homeostasis and temperature regulation in the human body. It defines homeostasis as the maintenance of constant internal conditions and describes how the skin, blood flow, sweating, and shivering help regulate body temperature.
2. The hypothalamus acts as the thermoregulatory center that detects temperature changes and coordinates responses like vasodilation and vasoconstriction to increase or decrease blood flow to the skin.
3. Other examples of homeostasis discussed include blood glucose regulation by the liver, pancreas, and hormones like insulin and glucagon. The kidneys also help regulate water, salts, and acid levels in the blood.
The document provides information about homeostasis and how the human body regulates various processes and conditions to maintain homeostasis. It discusses how homeostasis involves maintaining stable internal conditions like blood glucose levels and body temperature. It describes negative feedback loops and specific examples like insulin/glucagon regulation of blood glucose and temperature regulation in the body. Medical conditions that result from homeostatic imbalances are also mentioned, such as diabetes, dehydration, hypoglycemia, hyperglycemia, and gout.
The document discusses mechanisms for regulating body temperature in organisms. It explains that most cells function best between 30-40°C and that organisms have evolved various mechanisms to maintain an optimal internal temperature. These include insulation, vasoregulation of blood flow, sweating, shivering and behavioral adaptations. The hypothalamus plays a key role in sensing temperature changes and initiating responses. Mitochondria couple ATP production with heat generation. Brown fat contains uncoupling proteins that allow heat production without ATP generation.
Homeostasis is vital for maintaining the healthy functioning of the body. If homeostasis did not occur, it could lead to illness or even death. The body has various mechanisms in place to try and cope and restore homeostasis if it is disrupted.
Homeostasis refers to the process by which organisms regulate internal conditions to maintain a stable and constant environment. Negative feedback loops play an important role in homeostasis, as the response works to remove or reduce the stimulus to bring the regulated factor back to its normal range. Thermoregulation, the ability to maintain a stable body temperature, is an important example of homeostasis that allows for optimal biological functioning across different temperatures. Both behavioral and physiological mechanisms enable endothermic and ectothermic organisms to regulate their body temperatures.
Homeostasis refers to maintaining stable internal conditions despite external changes. The body uses control systems involving sensors, control centers, communication systems, and targets to regulate conditions like temperature, blood glucose, and blood pressure through negative and positive feedback loops. Most functions use negative feedback loops, which reverse changes to return the body to its set points. Positive feedback increases the rate of change away from set points when a rapid response is needed, such as during blood clotting or puberty.
Homeostasis refers to the body's ability to maintain stable internal conditions such as temperature and glucose levels. It is regulated by negative feedback mechanisms. For example, temperature receptors in the skin sense changes and send signals to the hypothalamus in the brain. If body temperature rises, the hypothalamus activates sweating and blood vessel dilation to cool the body through evaporation. Conversely, it triggers shivering and vessel constriction when temperatures fall to conserve heat. Various organs also help regulate variables through hormones, like the liver controlling glucose with insulin secretion. The skin plays an important role in homeostasis through insulation, sweating, and temperature reception.
The document discusses several biological processes related to homeostasis, including thermoregulation, osmoregulation, excretion, and feedback mechanisms. Thermoregulation involves various systems working to maintain steady body temperature through processes like evaporative cooling and heat shock proteins in plants. Osmoregulation requires adaptations for water balance in land animals like waxy skins and drinking moist foods, while plants employ strategies like thick, waxy leaves and positioning stomata. Excretion eliminates waste through various routes in both plants like shedding leaves and animals like sweating, breathing, and urinating. Feedback mechanisms can be negative, counteracting changes, or positive, increasing changes away from set points to enable rapid responses.
1. The document discusses homeostasis and temperature regulation in the human body. It defines homeostasis as the maintenance of constant internal conditions and describes how the skin, blood flow, sweating, and shivering help regulate body temperature.
2. The hypothalamus acts as the thermoregulatory center that detects temperature changes and coordinates responses like vasodilation and vasoconstriction to increase or decrease blood flow to the skin.
3. Other examples of homeostasis discussed include blood glucose regulation by the liver, pancreas, and hormones like insulin and glucagon. The kidneys also help regulate water, salts, and acid levels in the blood.
The document provides information about homeostasis and how the human body regulates various processes and conditions to maintain homeostasis. It discusses how homeostasis involves maintaining stable internal conditions like blood glucose levels and body temperature. It describes negative feedback loops and specific examples like insulin/glucagon regulation of blood glucose and temperature regulation in the body. Medical conditions that result from homeostatic imbalances are also mentioned, such as diabetes, dehydration, hypoglycemia, hyperglycemia, and gout.
The document discusses mechanisms for regulating body temperature in organisms. It explains that most cells function best between 30-40°C and that organisms have evolved various mechanisms to maintain an optimal internal temperature. These include insulation, vasoregulation of blood flow, sweating, shivering and behavioral adaptations. The hypothalamus plays a key role in sensing temperature changes and initiating responses. Mitochondria couple ATP production with heat generation. Brown fat contains uncoupling proteins that allow heat production without ATP generation.
Homeostasis is vital for maintaining the healthy functioning of the body. If homeostasis did not occur, it could lead to illness or even death. The body has various mechanisms in place to try and cope and restore homeostasis if it is disrupted.
Homeostasis refers to the process by which organisms regulate internal conditions to maintain a stable and constant environment. Negative feedback loops play an important role in homeostasis, as the response works to remove or reduce the stimulus to bring the regulated factor back to its normal range. Thermoregulation, the ability to maintain a stable body temperature, is an important example of homeostasis that allows for optimal biological functioning across different temperatures. Both behavioral and physiological mechanisms enable endothermic and ectothermic organisms to regulate their body temperatures.
Homeostasis refers to maintaining stable internal conditions despite external changes. The body uses control systems involving sensors, control centers, communication systems, and targets to regulate conditions like temperature, blood glucose, and blood pressure through negative and positive feedback loops. Most functions use negative feedback loops, which reverse changes to return the body to its set points. Positive feedback increases the rate of change away from set points when a rapid response is needed, such as during blood clotting or puberty.
Homeostasis refers to the body's ability to maintain stable internal conditions such as temperature and glucose levels. It is regulated by negative feedback mechanisms. For example, temperature receptors in the skin sense changes and send signals to the hypothalamus in the brain. If body temperature rises, the hypothalamus activates sweating and blood vessel dilation to cool the body through evaporation. Conversely, it triggers shivering and vessel constriction when temperatures fall to conserve heat. Various organs also help regulate variables through hormones, like the liver controlling glucose with insulin secretion. The skin plays an important role in homeostasis through insulation, sweating, and temperature reception.
This document provides information and guidelines about writing a report on homeostasis. It includes definitions of homeostasis, descriptions of the key components and mechanisms involved in maintaining homeostasis, examples of disruptions to homeostasis, and the adaptive advantages of homeostasis. Students are instructed to research and write a report that describes the purpose, components, and mechanism of a homeostatic control system, explains how balance is reestablished following a disruption, discusses the system's adaptive advantage, and analyzes an example of how a disruption could occur. The document also provides guidance on including citations and creating a bibliography to avoid plagiarism.
This document discusses homeostasis and temperature regulation in the human body. It explains that the body maintains a constant internal environment through homeostasis. The hypothalamus acts as the body's thermostat to monitor core temperature and initiate responses like sweating and shivering to cool down or heat up the body when temperature fluctuates outside the normal range. A variety of mechanisms in the skin like vasodilation, erecting hairs, and sweating help regulate heat exchange and maintain a stable core temperature.
Homeostasis refers to the maintenance of stable internal conditions in the body despite changes in the external environment. It allows cells to function properly through regulatory processes like negative feedback. The skin, kidneys, liver, endocrine and nervous systems all work to keep conditions like temperature, pH, water concentration, and glucose levels within narrow limits. When deviations occur, feedback mechanisms activate processes like sweating or vasoconstriction to return the internal environment to its optimal range for cellular activity.
Homeostasis refers to the concept of maintaining stable internal conditions in living organisms. The document provides examples of how homeostasis regulates important internal factors like body temperature, water levels, glucose levels, and blood pressure. It explains that receptors detect changes in these conditions and negative feedback mechanisms kick in to return the levels back to normal. For instance, if body temperature rises, the hypothalamus triggers sweating and increased blood flow to the skin to cool down. Overall, homeostasis is how the body automatically counteracts disturbances to keep its internal environment in a stable state.
Homeostasis is the process by which organisms regulate their internal environment to maintain a stable and constant condition. It involves negative feedback mechanisms to correct changes and keep conditions within a narrow range. Key homeostatic processes in mammals include thermoregulation to maintain body temperature, osmoregulation of water and mineral levels by the kidneys, and regulation of blood glucose levels by the liver and pancreas.
The document discusses how homeostasis is maintained in the body through various negative feedback systems. It provides examples of homeostasis for factors like temperature, pH, glucose, and water/salt content being kept constant. This allows enzymes to work effectively. It then discusses different mechanisms for regulating body temperature, such as blood vessels, hair, sweat glands, and metabolic rates. Large animals lose less heat than small animals due to lower surface area to volume ratios. Negative feedback systems involving insulin and glucagon help regulate blood glucose levels.
Homeostasis, thermoregulation, osmoregulation, and excretion were discussed. Homeostasis involves sensors, effectors, and negative feedback to maintain steady internal conditions. Thermoregulation uses sweating, vasoconstriction/vasodilation, and shivering to control temperature. Osmoregulation relies on ADH, aldosterone, and ANH to regulate water and salt levels. Excretion eliminates nitrogenous and salt wastes via glomerular filtration, tubular reabsorption, and secretion in the kidney nephron. Deterioration of excretion can cause kidney failure, gout, or kidney stones.
Homeostasis refers to the maintenance of a constant internal environment in the body. The body has mechanisms to keep key factors like temperature, water levels, and glucose concentration within normal ranges to allow cells to function properly. These mechanisms include sweating and vasodilation to cool the body down, vasoconstriction and piloerection to warm up, and insulin and glucagon regulation of glucose levels. The kidneys also help control water levels and remove waste from the blood in the form of urine.
Homeostasis refers to the maintenance of a constant internal environment in the body, keeping factors such as temperature, water concentration, and glucose levels stable despite changes in the external environment. This allows cells to function efficiently and prevents damage. Endothermic animals like mammals and birds internally regulate their body temperature, while ectothermic animals like reptiles rely on external temperatures. The skin plays an important role in homeostasis through its structure - the epidermis contains cells that protect the body and produce melanin and keratin, while the dermis contains sweat glands, blood vessels, and nerves that help regulate temperature.
1. Physiology is the study of the functions of living organisms from cells to whole organisms and organ systems.
2. Homeostasis refers to maintaining a constant internal environment through controlled systems that acquire, process, and integrate information to regulate physical and chemical conditions.
3. Thermoregulation is one example of homeostasis, as animals regulate their body temperature through behaviors, anatomical adaptations, and metabolic processes to remain within a narrow viable range despite varying environmental temperatures.
Homeostasis refers to the body's ability to maintain stable internal conditions even as external conditions change. It is achieved through negative or positive feedback mechanisms. Negative feedback acts to shut off or reduce the stimulus causing imbalance, like a thermostat regulating room temperature. Positive feedback intensifies the original stimulus to push the variable further, seen in blood clotting and childbirth. Key components of homeostatic systems are sensors that detect stress, a control center that receives this information and sends messages, and effectors that respond to messages to reestablish homeostasis. Examples provided are temperature regulation through sweating and blood sugar regulation through insulin release.
Homeostasis simplified! Wondering about the basics of homeostasis? Learn about balance within the human body and how this contributes to what we call "health".
The document summarizes homeostasis and temperature regulation in the human body. It discusses how homeostasis maintains stable internal conditions through negative feedback mechanisms. It describes temperature regulation mechanisms like vasodilation, sweating, and shivering that increase heat loss on hot days and decrease heat loss on cold days to maintain a constant body temperature. The skin plays an important role through blood flow regulation and sweat production.
The document discusses homeostasis, which is the maintenance of a constant internal environment in the body. It provides examples of homeostasis mechanisms for controlling body temperature, blood glucose levels, and water levels. Negative feedback loops work to maintain a stable internal state when environmental conditions change. The kidneys and hormones like insulin and glucagon help regulate glucose and water levels. Plants also use mechanisms like stomata to control water balance and maintain homeostasis.
FISIOLOGI SENAM Control of the internal enviromentAmin Upsi
This document summarizes key concepts from Chapter 2 of a textbook on exercise science. It discusses homeostasis and biological control systems. Homeostasis refers to maintaining a constant internal environment, while steady state means the environment is constant but not necessarily normal. Most control systems use negative feedback to reverse disturbances. Exercise challenges homeostasis by disrupting variables like pH and temperature, but control systems can maintain steady state during submaximal exercise. Intense or prolonged exercise may exceed homeostatic control capacities.
The document discusses homeostasis and how the body maintains internal stability. It defines homeostasis as the process by which the body maintains a stable internal environment. It states that the hypothalamus, located in the brain, helps regulate key body processes like temperature, hunger, blood pressure, and circadian rhythms to keep homeostasis. When the body experiences internal changes, the hypothalamus works with other systems like the nervous and endocrine systems to restore the body's systems back to their normal states.
The document discusses several body systems and how they contribute to homeostasis. It explains that homeostasis is the process by which organisms maintain stable internal conditions despite external changes. Negative feedback loops are described as a key mechanism, where a change triggers a response that acts to reverse the change. Several body systems, including the nervous, digestive, urinary, circulatory, respiratory, skeletal, and muscular systems, are discussed in terms of how they utilize feedback loops to keep conditions like temperature, blood sugar, water levels, and more within normal ranges. Diseases that can disrupt homeostasis in each system are also listed.
The document discusses homeostasis and temperature regulation in the human body. It defines homeostasis as the maintenance of a constant internal environment through negative feedback mechanisms. It describes how the body regulates temperature through receptors in the skin that detect temperature changes and signal the hypothalamus. The hypothalamus then initiates responses like vasodilation, sweating, shivering and changing metabolic rate to increase or decrease heat loss and maintain core body temperature.
The document discusses the integumentary system and its role in homeostasis. It describes the layers of the skin, including the dermis and epidermis. The skin acts as a barrier against microbes and regulates body temperature through sweating and blood flow. It also synthesizes vitamins and contains sensory receptors to detect stimuli like touch and temperature.
The document discusses how the cardiac cycle is controlled by the conduction system of the heart and how heart rate is regulated by the cardiac control center (CCC) in the brain. The CCC regulates heart rate by stimulating either the sympathetic or parasympathetic nervous system, which can increase or decrease heart rate respectively. Factors like neural signals from chemoreceptors and proprioceptors, hormonal signals like adrenaline, and intrinsic factors like venous return can affect the activity of the CCC. During endurance activities, chemoreceptors detect changes and stimulate the CCC to initiate the sympathetic nervous system, increasing heart rate and cardiac output.
This document provides information and guidelines about writing a report on homeostasis. It includes definitions of homeostasis, descriptions of the key components and mechanisms involved in maintaining homeostasis, examples of disruptions to homeostasis, and the adaptive advantages of homeostasis. Students are instructed to research and write a report that describes the purpose, components, and mechanism of a homeostatic control system, explains how balance is reestablished following a disruption, discusses the system's adaptive advantage, and analyzes an example of how a disruption could occur. The document also provides guidance on including citations and creating a bibliography to avoid plagiarism.
This document discusses homeostasis and temperature regulation in the human body. It explains that the body maintains a constant internal environment through homeostasis. The hypothalamus acts as the body's thermostat to monitor core temperature and initiate responses like sweating and shivering to cool down or heat up the body when temperature fluctuates outside the normal range. A variety of mechanisms in the skin like vasodilation, erecting hairs, and sweating help regulate heat exchange and maintain a stable core temperature.
Homeostasis refers to the maintenance of stable internal conditions in the body despite changes in the external environment. It allows cells to function properly through regulatory processes like negative feedback. The skin, kidneys, liver, endocrine and nervous systems all work to keep conditions like temperature, pH, water concentration, and glucose levels within narrow limits. When deviations occur, feedback mechanisms activate processes like sweating or vasoconstriction to return the internal environment to its optimal range for cellular activity.
Homeostasis refers to the concept of maintaining stable internal conditions in living organisms. The document provides examples of how homeostasis regulates important internal factors like body temperature, water levels, glucose levels, and blood pressure. It explains that receptors detect changes in these conditions and negative feedback mechanisms kick in to return the levels back to normal. For instance, if body temperature rises, the hypothalamus triggers sweating and increased blood flow to the skin to cool down. Overall, homeostasis is how the body automatically counteracts disturbances to keep its internal environment in a stable state.
Homeostasis is the process by which organisms regulate their internal environment to maintain a stable and constant condition. It involves negative feedback mechanisms to correct changes and keep conditions within a narrow range. Key homeostatic processes in mammals include thermoregulation to maintain body temperature, osmoregulation of water and mineral levels by the kidneys, and regulation of blood glucose levels by the liver and pancreas.
The document discusses how homeostasis is maintained in the body through various negative feedback systems. It provides examples of homeostasis for factors like temperature, pH, glucose, and water/salt content being kept constant. This allows enzymes to work effectively. It then discusses different mechanisms for regulating body temperature, such as blood vessels, hair, sweat glands, and metabolic rates. Large animals lose less heat than small animals due to lower surface area to volume ratios. Negative feedback systems involving insulin and glucagon help regulate blood glucose levels.
Homeostasis, thermoregulation, osmoregulation, and excretion were discussed. Homeostasis involves sensors, effectors, and negative feedback to maintain steady internal conditions. Thermoregulation uses sweating, vasoconstriction/vasodilation, and shivering to control temperature. Osmoregulation relies on ADH, aldosterone, and ANH to regulate water and salt levels. Excretion eliminates nitrogenous and salt wastes via glomerular filtration, tubular reabsorption, and secretion in the kidney nephron. Deterioration of excretion can cause kidney failure, gout, or kidney stones.
Homeostasis refers to the maintenance of a constant internal environment in the body. The body has mechanisms to keep key factors like temperature, water levels, and glucose concentration within normal ranges to allow cells to function properly. These mechanisms include sweating and vasodilation to cool the body down, vasoconstriction and piloerection to warm up, and insulin and glucagon regulation of glucose levels. The kidneys also help control water levels and remove waste from the blood in the form of urine.
Homeostasis refers to the maintenance of a constant internal environment in the body, keeping factors such as temperature, water concentration, and glucose levels stable despite changes in the external environment. This allows cells to function efficiently and prevents damage. Endothermic animals like mammals and birds internally regulate their body temperature, while ectothermic animals like reptiles rely on external temperatures. The skin plays an important role in homeostasis through its structure - the epidermis contains cells that protect the body and produce melanin and keratin, while the dermis contains sweat glands, blood vessels, and nerves that help regulate temperature.
1. Physiology is the study of the functions of living organisms from cells to whole organisms and organ systems.
2. Homeostasis refers to maintaining a constant internal environment through controlled systems that acquire, process, and integrate information to regulate physical and chemical conditions.
3. Thermoregulation is one example of homeostasis, as animals regulate their body temperature through behaviors, anatomical adaptations, and metabolic processes to remain within a narrow viable range despite varying environmental temperatures.
Homeostasis refers to the body's ability to maintain stable internal conditions even as external conditions change. It is achieved through negative or positive feedback mechanisms. Negative feedback acts to shut off or reduce the stimulus causing imbalance, like a thermostat regulating room temperature. Positive feedback intensifies the original stimulus to push the variable further, seen in blood clotting and childbirth. Key components of homeostatic systems are sensors that detect stress, a control center that receives this information and sends messages, and effectors that respond to messages to reestablish homeostasis. Examples provided are temperature regulation through sweating and blood sugar regulation through insulin release.
Homeostasis simplified! Wondering about the basics of homeostasis? Learn about balance within the human body and how this contributes to what we call "health".
The document summarizes homeostasis and temperature regulation in the human body. It discusses how homeostasis maintains stable internal conditions through negative feedback mechanisms. It describes temperature regulation mechanisms like vasodilation, sweating, and shivering that increase heat loss on hot days and decrease heat loss on cold days to maintain a constant body temperature. The skin plays an important role through blood flow regulation and sweat production.
The document discusses homeostasis, which is the maintenance of a constant internal environment in the body. It provides examples of homeostasis mechanisms for controlling body temperature, blood glucose levels, and water levels. Negative feedback loops work to maintain a stable internal state when environmental conditions change. The kidneys and hormones like insulin and glucagon help regulate glucose and water levels. Plants also use mechanisms like stomata to control water balance and maintain homeostasis.
FISIOLOGI SENAM Control of the internal enviromentAmin Upsi
This document summarizes key concepts from Chapter 2 of a textbook on exercise science. It discusses homeostasis and biological control systems. Homeostasis refers to maintaining a constant internal environment, while steady state means the environment is constant but not necessarily normal. Most control systems use negative feedback to reverse disturbances. Exercise challenges homeostasis by disrupting variables like pH and temperature, but control systems can maintain steady state during submaximal exercise. Intense or prolonged exercise may exceed homeostatic control capacities.
The document discusses homeostasis and how the body maintains internal stability. It defines homeostasis as the process by which the body maintains a stable internal environment. It states that the hypothalamus, located in the brain, helps regulate key body processes like temperature, hunger, blood pressure, and circadian rhythms to keep homeostasis. When the body experiences internal changes, the hypothalamus works with other systems like the nervous and endocrine systems to restore the body's systems back to their normal states.
The document discusses several body systems and how they contribute to homeostasis. It explains that homeostasis is the process by which organisms maintain stable internal conditions despite external changes. Negative feedback loops are described as a key mechanism, where a change triggers a response that acts to reverse the change. Several body systems, including the nervous, digestive, urinary, circulatory, respiratory, skeletal, and muscular systems, are discussed in terms of how they utilize feedback loops to keep conditions like temperature, blood sugar, water levels, and more within normal ranges. Diseases that can disrupt homeostasis in each system are also listed.
The document discusses homeostasis and temperature regulation in the human body. It defines homeostasis as the maintenance of a constant internal environment through negative feedback mechanisms. It describes how the body regulates temperature through receptors in the skin that detect temperature changes and signal the hypothalamus. The hypothalamus then initiates responses like vasodilation, sweating, shivering and changing metabolic rate to increase or decrease heat loss and maintain core body temperature.
The document discusses the integumentary system and its role in homeostasis. It describes the layers of the skin, including the dermis and epidermis. The skin acts as a barrier against microbes and regulates body temperature through sweating and blood flow. It also synthesizes vitamins and contains sensory receptors to detect stimuli like touch and temperature.
The document discusses how the cardiac cycle is controlled by the conduction system of the heart and how heart rate is regulated by the cardiac control center (CCC) in the brain. The CCC regulates heart rate by stimulating either the sympathetic or parasympathetic nervous system, which can increase or decrease heart rate respectively. Factors like neural signals from chemoreceptors and proprioceptors, hormonal signals like adrenaline, and intrinsic factors like venous return can affect the activity of the CCC. During endurance activities, chemoreceptors detect changes and stimulate the CCC to initiate the sympathetic nervous system, increasing heart rate and cardiac output.
Control of heart rate - A2 AQA BiologyClaireHall95
The autonomic nervous system controls the involuntary functions of internal organs like the heart. It has two divisions - the sympathetic and parasympathetic nervous systems. The sympathetic system increases heart rate during stress while the parasympathetic system decreases it during rest. Heart rate is regulated by the medulla oblongata in the brain which receives input from chemoreceptors sensitive to chemical changes in blood and pressure receptors sensitive to blood pressure changes. This allows the medulla to increase or decrease heart rate via the sympathetic and parasympathetic systems as needed to maintain appropriate blood flow.
The document discusses several physiological homeostasis mechanisms in the human body including water regulation, blood sugar control, and temperature regulation. It explains that negative feedback loops involving key organs like the hypothalamus and hormones help maintain conditions within tolerable limits. Diagrams and processes of osmoregulation, blood sugar regulation, and temperature control through endothermic and ectothermic responses are presented along with examples of homeostasis breakdown under extreme and prolonged conditions.
The cardiac cycle consists of relaxation (diastole) and contraction (systole) of the heart. Each cycle begins with an electrical impulse from the sinus node which causes atrial contraction and is recorded as the P wave on an ECG. Contraction of the ventricles follows, recorded as the QRS complex, pumping blood into the arteries. Ventricular relaxation is recorded as the T wave. The heart's pumping is regulated intrinsically via the Frank-Starling mechanism and extrinsically by the autonomic nervous system.
The document discusses 5 heart rate zones for exercise. Zone 1 from 50-60% of maximum heart rate is for recovery and weight loss. Zone 2 from 60-70% improves heart and muscle function and is good for weight management. Zone 3 from 70-80% is most effective for cardiovascular fitness. Zone 4 from 80-90% transitions to anaerobic training. Zone 5 from 90-100% should only be done for short periods and builds fast twitch muscles. Other factors like dehydration, heat, and altitude can increase heart rate. A lower resting heart rate indicates a higher fitness level.
Homeostasis refers to the maintenance of stable internal conditions in the body despite changes in the external environment. Key organs like the skin, kidneys, liver, and endocrine and nervous systems work together to regulate factors such as temperature, pH, water concentration, and glucose levels through negative feedback loops. When detected variations in these conditions occur, systems respond to counteract the change and restore homeostasis.
The document summarizes the control of the heartbeat. The sinoatrial node (SAN) located in the right atrium acts as the pacemaker and initiates electrical signals that cause the atria to contract. The atrioventricular node (AVN) located between the atria and ventricles briefly delays the signal to allow the atria to empty before ventricular contraction. The purkinje fibers then transmit the signal to the ventricle walls to cause synchronized contraction from bottom to top, pumping blood out of the heart.
Heart beat monitor using AT89S52 microcontrollerSushil Mishra
We , in this project are measuring the heart beat using the pulse oximetry logic.
The timer we have set for counting the heart beat is 30s.
There is a set point we can decide, after 30 s the heartbeat would be shown on the LCD along with a buzzer sound (if it exceeds the set point).
The document discusses how the nervous system and hormonal system modify the heart rate to meet the body's demands. The nervous system controls heart rate through the sympathetic and parasympathetic nerves. The sympathetic nerves increase heart rate during exercise or stress while the parasympathetic nerves decrease it during rest. The hormonal system also increases heart rate through the hormone adrenaline.
The document discusses how the hypothalamus regulates body temperature through increasing or decreasing mechanisms in response to heat or cold. In hot conditions, the hypothalamus triggers sweating and vasodilation to cool the body, while in cold conditions it causes piloerection, vasoconstriction, shivering and metabolic heat production to conserve heat. The hypothalamus integrates input from thermoreceptors in the skin and blood to maintain core temperature within a narrow range.
The document discusses homeostasis, which refers to the maintenance of stable internal conditions in the body despite external changes. It achieves this through negative feedback systems involving multiple organ systems. For example, temperature is regulated by sweating, vasodilation and vasoconstriction triggered by temperature sensors in the brain. Blood sugar levels are regulated by insulin and glucagon secretion from the pancreas. Kidneys also regulate fluid levels and remove wastes through processes like reabsorption and urine production.
The document discusses heat-related illnesses and provides information on their prevention and treatment. It describes symptoms of conditions like dehydration, heat rash, heat cramps, and heat stroke. Engineering controls like ventilation, air cooling, and shade are recommended to reduce heat stress. Administrative controls include work-rest cycles, fluid replacement, acclimation, and monitoring workers for signs of illness. Proper hydration, ventilation, loose clothing, and limiting activity in heat are emphasized for prevention. Urine color is presented as an indicator of hydration level.
at this summer season many people are working in outdoor in construction and drilling sites the heat stress is one of the risks that this population are facing , take extrem precautions
Homeostasis refers to the maintenance of stable internal conditions in the body despite changes in the external environment. It allows cells to function properly through regulatory processes like negative feedback. The skin, kidneys, liver, endocrine and nervous systems all work to keep conditions like temperature, pH, water concentration, and glucose levels within narrow limits. When deviations occur, feedback mechanisms activate processes like sweating or vasoconstriction to return the internal environment to its optimal range for cellular activity.
Homeostasis refers to maintaining stable internal conditions. Negative feedback loops work to return levels that deviate from a set point back to normal. One key example is thermoregulation, where the hypothalamus monitors core body temperature and triggers responses like sweating or shivering. Another is blood glucose regulation, where the pancreas secretes insulin and glucagon in response to glucose levels to maintain them between 80-100 mg/100mL. Diabetes occurs when this regulation fails due to insulin deficiency or resistance. The kidneys also help regulate water levels and remove waste through urine production controlled by ADH.
The document discusses homeostasis and temperature regulation in the human body. It maintains a core body temperature through coordinated responses between the hypothalamus, skin, muscles, and glands. When body temperature rises, the hypothalamus triggers sweating and vasodilation to increase heat loss through evaporation and radiation. When temperature falls, shivering and metabolic increases generate heat while vasoconstriction and piloerection reduce loss. Precise coordination allows humans to function in varied environments.
1. The human body maintains homeostasis by regulating its internal temperature through various mechanisms controlled by the hypothalamus.
2. When body temperature rises, the hypothalamus triggers effectors like sweat glands and blood vessels in the skin to dilate, increasing heat loss through sweating and radiation.
3. If temperature continues to rise, other effectors like shivering and increased metabolic hormone release generate more heat to dissipate.
Hemostasis is the body's natural reaction to stop bleeding from an injury by forming a blood clot. It is a multi-step process involving platelet clotting to form a temporary plug, coagulation factors that stabilize the plug through a cascade, and fibrin clots that permanently seal the damage. Homeostasis maintains stable conditions in the body through feedback loops, but can fail due to diseases like diabetes that disrupt regulation of blood glucose. Tissues also have natural surface fluctuations driven by cell dynamics of rearrangement, division and death that help maintain homeostasis.
The maintenance of a constant environment in the body is called Homeostasis
Homeostasis is also called dynamic equilibrium
equilibrium maintained BY:
Feedback systems
Negative feedback
Positive feedback
Negative feedback: Response triggered by changed conditions serves to reverse the change
E.g., Body temperature increases
Skin blood vessels dilate
Body temperature decreases
Positive feedback: The response triggered by changing conditions serves to move the variable even further away from its steady state
E.g., uterine contractions are stimulated by oxytocin
baby moves towards cervix
more oxytocin is released
This document discusses the effects of cold climates on athletes and how the body responds. It notes that a cool environment can improve performance by reducing strain on the cardiovascular system. However, very cold temperatures can lower core body temperature and reduce VO2 max, hindering performance. The body responds to cold by constricting blood vessels, increasing metabolism through shivering or non-shivering thermogenesis. Prolonged extreme cold can cause frostbite or hypothermia, with symptoms ranging from mild confusion to coma depending on how low core temperature drops.
Biology Form 5 Chapter 3 - Coordination & Response Part 5 - Body Temperatur...Nirmala Josephine
The document provides information about homeostasis and thermoregulation in humans. It discusses how the body maintains an optimal internal temperature of 37°C through negative feedback mechanisms. When temperatures rise above 37°C, receptors detect this and send signals to the hypothalamus. Effectors are triggered to increase heat loss through vasodilation, sweating, hair lying flat. When temperatures fall below 37°C, receptors send signals to the hypothalamus and effectors are triggered to decrease heat loss and increase heat production through vasoconstriction, decreased sweating, hair standing up, shivering, and increased metabolic rate. The hypothalamus acts as the processing center to coordinate these responses and regulate the body's
The document discusses homeostasis and how the body regulates temperature, water levels, and blood glucose levels. It explains that the body maintains a constant internal environment through automatic control systems. For example, the hypothalamus monitors core body temperature and triggers responses like shivering or sweating to maintain a temperature of 37°C. Similarly, the kidneys and pancreas help control water and glucose levels through hormones like ADH, insulin, and glucagon. Homeostasis allows the body's cells to function optimally despite changing external conditions.
The document discusses homeostasis and thermoregulation in the human body. It explains that the body maintains a constant core temperature of 37°C through temperature receptors that detect changes and signal the hypothalamus. The hypothalamus then triggers responses like vasodilation, vasoconstriction, sweating, and shivering to balance heat gain and loss. Negative feedback loops involving the pancreas and liver also help regulate blood glucose and water levels to maintain homeostasis.
lec 3 Thermoregulation and its mechanismayeshavirk45
In this slide you will find introduction of thermoregulation, mechanism of thermoregulation, systems involoved in thermoregulation , negative and positive feedback mechaniams wirh examples.
Chapter 12 Homeostasis Lesson 2 - Examples of Homeostasis in Manj3di79
1) The document discusses various examples of homeostasis in humans, including blood glucose concentration regulation by the liver and pancreas, blood water potential regulation by the kidney and pituitary gland, and temperature regulation.
2) It describes how temperature regulation works, with the hypothalamus detecting high or low body temperatures and initiating responses like vasoconstriction, vasodilation, sweating, and shivering to restore normal temperature.
3) The skin, blood vessels, sweat glands, hair erector muscles, and other structures all play roles in temperature regulation through mechanisms like insulation, sweating, blood flow control, and shivering.
Safety guidelines by ec 16.1 notes for referenceMumbai Hiker
The document discusses acclimatization to high altitudes and provides information on how the body adjusts as it gains altitude. It notes that as altitude increases, atmospheric pressure and oxygen levels decrease. The body starts acclimatizing as soon as a person gains altitude through processes like increased heart and breathing rates. It recommends ways for people to support their body's adjustment, such as staying hydrated, eating well, resting adequately, and pacing activity levels. It also discusses dehydration, hypothermia, and blister prevention.
Animal Science Body Temperature and Regulation.pptxROBERTROMANO29
Animals regulate their body temperature through various mechanisms, including behavioral, physiological, and anatomical adaptations. Thermoreceptors in the skin detect changes in temperature and relay this information to the brain. The brain then initiates responses like vasoconstriction, shivering, and seeking shade to increase or decrease heat loss. Birds and mammals are endothermic, using metabolic heat production to maintain a stable internal temperature. In contrast, reptiles and amphibians are ectothermic and rely on external environmental heat sources.
1. Teachers will participate in project-based professional learning focused on using small ICT tasks to enhance teaching and student learning.
2. Teachers will choose an area of interest, research it in a small group, and devise an ICT task to use in their teaching. They will reflect on the task's effectiveness and make improvements.
3. The first session will be in Week 8 where teachers will discuss their key competencies and potential ICT tasks. They will continue working on their projects during PD sessions and their own time throughout the term.
This document contains information about a Year 11 100 Science class, including:
- Links to online resources about acids and bases aspects that will be covered, such as atomic structure, properties, and uses.
- Examples of common acids and bases that will be discussed, including HCl, H2SO4, HNO3, and various metal oxides, hydroxides, and carbonates.
- Instructions and questions for students to research atomic structure, the periodic table, and drawing electron configurations of elements.
This document provides instructions for using OneNote to complete work for a biology class. It outlines how students should listen in class, read powerpoints, think about and answer questions, complete online activities, Scipad work, and Moodle quizzes. It emphasizes thinking over copying notes. The document also includes information on achievement standards, exam specifications, and the topic outline covering responses to the environment.
This document contains information about a Year 11 100 Science class, including:
- Links to online resources about acids and bases aspects that will be covered, such as atomic structure, properties, and uses.
- Examples of common acids and bases that will be discussed, including HCl, H2SO4, HNO3, and various metal oxides, hydroxides, and carbonates.
- Instructions and questions for students to research atomic structure, ions, and the periodic table.
Here are potential responses to the questions:
4) You don't always get sick from undercooked meat because not all meat contains harmful bacteria. The bacteria have to be present and in large enough quantities to cause illness. Other factors like your own immune system also play a role in whether or not you get sick.
5) Even when multiple people eat contaminated food, only some may get sick because factors like age, existing health conditions, medication and the size of the bacteria dose can affect the chances of getting an infection. People's individual immune systems also respond differently.
6) It can take time for symptoms of a foodborne illness to appear because the bacteria first have to multiply inside the body until they reach levels high enough to
1. Electric current is measured in amps using an ammeter connected in series in the circuit. In a series circuit, the current is the same at all points. In a parallel circuit, the current splits and the readings on each branch add up to the total current.
2. Voltage is measured in volts using a voltmeter connected in parallel across components. In a series circuit, the voltage drops across each component add up to the total battery voltage. In a parallel circuit, the voltage is the same across each branch.
3. Experiments were conducted to determine the effect of connecting components in series versus parallel on current and voltage. It was found that in a series circuit, the current is the same
ICT tools provide many benefits for science education including accessibility of content anywhere, catering to different learning styles, easy differentiation of content, and freeing up teachers to assist students. Popular tools mentioned include Moodle, Google Calendar, online quizzes and forums, videos, animations, Kahoots, Padlet, displaying student work, and science-related apps. The document emphasizes keeping activities short, providing variety, and ensuring technologies work properly for students.
This document provides information about atomic structure:
1. It explains that atoms are made up of even smaller particles called subatomic particles, including protons, neutrons, and electrons.
2. Protons and neutrons are located at the center of the atom in a dense core called the nucleus. Electrons orbit around the outside of the atom.
3. Atoms have an overall neutral charge because they contain an equal number of positively charged protons and negatively charged electrons. Neutrons have no charge.
This document provides information about force and motion, including definitions, formulas, and examples. It includes:
- Definitions of key terms like speed, velocity, mass, weight, friction, and drag.
- Formulas for calculating speed, velocity, and weight. Speed is defined as distance divided by time. Weight is defined as mass multiplied by gravity.
- Examples of calculating speed, velocity, and weight in different scenarios. This includes examples using conversions between units like km/h, m/s, and calculations for objects on Earth and other planets.
- Descriptions of factors that affect motion, like balanced and unbalanced forces, friction, air resistance, gravity, and weight. Examples are
This document provides information about genetics and inheritance. It begins by explaining that all individuals are genetically unique except for identical twins. It then defines key genetics terms like phenotype, genotype, homozygous, heterozygous, alleles, dominant and recessive. It distinguishes between continuous and discrete variation. It describes DNA and chromosomes, and explains how characteristics are inherited from parents. It also covers mutations and how genetic testing can determine genotypes.
1. The document discusses various topics related to evolution and speciation including gene flow, genetic drift, modes of speciation, isolating mechanisms, natural selection, variation, polyploidy, and aneuploidy.
2. Key terms are defined such as genes, alleles, gene pool, mutation, and speciation. Different types of speciation are described including allopatric, sympatric, and cline speciation.
3. Mechanisms that can lead to reproductive isolation between species are explained, including prezygotic barriers like geographic isolation and postzygotic barriers like hybrid sterility.
Speciation can occur through several modes, including instant speciation through polyploidy, sympatric speciation within the same habitat, and allopatric speciation when populations are isolated geographically. Reproductive isolating mechanisms like behavioral, ecological, or structural barriers can prevent interbreeding and lead to the evolution of new species over time. Evidence for evolution includes fossils showing transitions over generations, comparative anatomy revealing homologous and analogous structures, and molecular analysis of DNA and proteins. Evolution occurs through natural selection acting on genetic variation and results in changes to populations and the potential emergence of new species through gradual or punctuated processes over long periods.
This type of deafness in the teacher is unlikely to be inherited by their new baby because:
- The teacher developed deafness as a result of environmental factors (noisy classes), not genetic factors. Their deafness was acquired and not something they were born with.
- Acquired or environmental traits are not heritable as they are not encoded in our genes. They result from interactions with the surrounding environment rather than our genetic makeup.
- For a trait to be inherited, it must have a genetic basis - the trait must be influenced by the genes we receive from our parents. Since the teacher's deafness was caused by environmental noise exposure rather than a genetic mutation or condition, it would not be passed on to offspring through their
This document provides information about physics concepts related to kinematics including displacement, velocity, acceleration, and their relationships. It defines important terms like speed and acceleration. It presents the key equations for calculating values like speed, acceleration, distance and time. Examples are provided to demonstrate how to set up and solve kinematics problems using the appropriate equations and units. Formulas are given for working with graphs of distance-time and speed-time to determine values and motion. Forces are also introduced along with the key equations for force, mass and acceleration.
This document provides information about energy and waves for a Year 9 science class. It begins with defining energy and naming common forms of energy like chemical, light, sound, and heat. It describes how energy allows objects and living things to function. It then discusses different types of waves like transverse and longitudinal waves, using light and sound waves as examples. It explains concepts such as amplitude, frequency, wavelength, pitch and loudness in relation to waves. Diagrams show the ear and how sound travels to be heard. Laws of reflection and uses of reflective surfaces are also covered. Success criteria and review questions are provided throughout.
This document provides guidance for students on carrying out an in-depth practical chemistry investigation for assessment purposes. It outlines the key components of the investigation including developing an accurate procedure, controlling variables, processing and representing data, writing a justified conclusion, and relating findings to chemistry ideas. The document also provides examples of topics, guidelines for setting up tables and graphs, variables to control in experiments, and pointers to remember for the assessment.
Plant and Animal Responses to the Environmentngibellini
This document provides information about Biology Standard 3.3 on plant and animal responses to the external environment. It outlines the achievement and in-depth understanding standards, including describing and explaining the processes, adaptive advantages, and responses related to orientation in space and time, interspecific and intraspecific relationships. The document provides details on exam specifications, key terms, online activities, and topics to be covered, including the basics of abiotic and biotic factors, how and why organisms respond, and different types of responses like tropisms, rhythms, and relationships. Examples and diagrams are provided to illustrate concepts.
The document provides information about acids and bases, including:
1) Acids have a pH range from 0-7 and contain hydrogen ions, while bases have a pH range from 8-14 and contain hydroxide ions.
2) Acids turn litmus paper red and bases turn it blue, while neutral substances turn it green. Common household acids include vinegar and lemon juice, while bases include baking soda.
3) When an acid and base are mixed, a neutralization reaction occurs where they react together to form a salt and water, resulting in a neutral pH of 7.
Urbanization has negatively impacted the diversity and health of organisms in Reservoir Creek. Upstream areas near residential development had higher temperatures, turbidity, and pollution compared to downstream areas with less development. Upstream sites contained only pollution-tolerant species like worms and midges, while downstream sites contained more sensitive species like mayflies and dragonflies. The changes in abiotic factors from urbanization, such as increased runoff, have disrupted the ecosystem by reducing suitable habitat and food sources for sensitive species. This loss of diversity upstream could impact the whole ecosystem if not addressed.
This document contains lesson plans and activities for a unit on human anatomy and physiology. It includes instructions for students to complete various activities to learn about the skeletal system, muscles, joints, circulatory system, respiration, and reproductive systems. Students will label bones and muscles, identify antagonistic muscle pairs, describe synovial joints, outline the circulatory system and functions of blood components, explain the process of respiration, and identify features of the male and female reproductive systems and fertilization. Assessment activities include labeling diagrams, online quizzes, and Kahoots games. The goal is for students to understand the basic structures and functions of the major body systems.
Beyond Degrees - Empowering the Workforce in the Context of Skills-First.pptxEduSkills OECD
Iván Bornacelly, Policy Analyst at the OECD Centre for Skills, OECD, presents at the webinar 'Tackling job market gaps with a skills-first approach' on 12 June 2024
it describes the bony anatomy including the femoral head , acetabulum, labrum . also discusses the capsule , ligaments . muscle that act on the hip joint and the range of motion are outlined. factors affecting hip joint stability and weight transmission through the joint are summarized.
Leveraging Generative AI to Drive Nonprofit InnovationTechSoup
In this webinar, participants learned how to utilize Generative AI to streamline operations and elevate member engagement. Amazon Web Service experts provided a customer specific use cases and dived into low/no-code tools that are quick and easy to deploy through Amazon Web Service (AWS.)
Gender and Mental Health - Counselling and Family Therapy Applications and In...PsychoTech Services
A proprietary approach developed by bringing together the best of learning theories from Psychology, design principles from the world of visualization, and pedagogical methods from over a decade of training experience, that enables you to: Learn better, faster!
বাংলাদেশের অর্থনৈতিক সমীক্ষা ২০২৪ [Bangladesh Economic Review 2024 Bangla.pdf] কম্পিউটার , ট্যাব ও স্মার্ট ফোন ভার্সন সহ সম্পূর্ণ বাংলা ই-বুক বা pdf বই " সুচিপত্র ...বুকমার্ক মেনু 🔖 ও হাইপার লিংক মেনু 📝👆 যুক্ত ..
আমাদের সবার জন্য খুব খুব গুরুত্বপূর্ণ একটি বই ..বিসিএস, ব্যাংক, ইউনিভার্সিটি ভর্তি ও যে কোন প্রতিযোগিতা মূলক পরীক্ষার জন্য এর খুব ইম্পরট্যান্ট একটি বিষয় ...তাছাড়া বাংলাদেশের সাম্প্রতিক যে কোন ডাটা বা তথ্য এই বইতে পাবেন ...
তাই একজন নাগরিক হিসাবে এই তথ্য গুলো আপনার জানা প্রয়োজন ...।
বিসিএস ও ব্যাংক এর লিখিত পরীক্ষা ...+এছাড়া মাধ্যমিক ও উচ্চমাধ্যমিকের স্টুডেন্টদের জন্য অনেক কাজে আসবে ...
How to Setup Warehouse & Location in Odoo 17 InventoryCeline George
In this slide, we'll explore how to set up warehouses and locations in Odoo 17 Inventory. This will help us manage our stock effectively, track inventory levels, and streamline warehouse operations.
LAND USE LAND COVER AND NDVI OF MIRZAPUR DISTRICT, UPRAHUL
This Dissertation explores the particular circumstances of Mirzapur, a region located in the
core of India. Mirzapur, with its varied terrains and abundant biodiversity, offers an optimal
environment for investigating the changes in vegetation cover dynamics. Our study utilizes
advanced technologies such as GIS (Geographic Information Systems) and Remote sensing to
analyze the transformations that have taken place over the course of a decade.
The complex relationship between human activities and the environment has been the focus
of extensive research and worry. As the global community grapples with swift urbanization,
population expansion, and economic progress, the effects on natural ecosystems are becoming
more evident. A crucial element of this impact is the alteration of vegetation cover, which plays a
significant role in maintaining the ecological equilibrium of our planet.Land serves as the foundation for all human activities and provides the necessary materials for
these activities. As the most crucial natural resource, its utilization by humans results in different
'Land uses,' which are determined by both human activities and the physical characteristics of the
land.
The utilization of land is impacted by human needs and environmental factors. In countries
like India, rapid population growth and the emphasis on extensive resource exploitation can lead
to significant land degradation, adversely affecting the region's land cover.
Therefore, human intervention has significantly influenced land use patterns over many
centuries, evolving its structure over time and space. In the present era, these changes have
accelerated due to factors such as agriculture and urbanization. Information regarding land use and
cover is essential for various planning and management tasks related to the Earth's surface,
providing crucial environmental data for scientific, resource management, policy purposes, and
diverse human activities.
Accurate understanding of land use and cover is imperative for the development planning
of any area. Consequently, a wide range of professionals, including earth system scientists, land
and water managers, and urban planners, are interested in obtaining data on land use and cover
changes, conversion trends, and other related patterns. The spatial dimensions of land use and
cover support policymakers and scientists in making well-informed decisions, as alterations in
these patterns indicate shifts in economic and social conditions. Monitoring such changes with the
help of Advanced technologies like Remote Sensing and Geographic Information Systems is
crucial for coordinated efforts across different administrative levels. Advanced technologies like
Remote Sensing and Geographic Information Systems
9
Changes in vegetation cover refer to variations in the distribution, composition, and overall
structure of plant communities across different temporal and spatial scales. These changes can
occur natural.
Communicating effectively and consistently with students can help them feel at ease during their learning experience and provide the instructor with a communication trail to track the course's progress. This workshop will take you through constructing an engaging course container to facilitate effective communication.
3. Homeostasis
________________- body’s ability to maintain a constant internal
environment.
Required for proper functioning of the body because the
______________ that control all metabolic activity essential for life,
are very sensitive to changes in their environment.
Thus constant state must be maintained in spite of changing the
____________________________.
4. Balancing Act
The following factors need to be kept in balance:
Body temperature
Water (osmotic pressure)
Blood sugar
Carbon dioxide concentration
Oxygen concentration
pH
Mineral salts
5. Negative Feedback
When a condition in the body changes from the norm, a __________is sent
to a control center (usually the _____________ in the brain).
The control center then instructs _____________ (_________________) to
respond and _____________ the change.
The control center then _________________ a change in temperature as a
result of the ________________, it then sends a message to
_______________ the response or stop it all together if temperatures have
returned to ______________
Works in the ______________ direction to the stimulus hence
_________________,
eg you are hot from running, so brain tells your body to sweat to cool you
down. Once you are cool your brain tells your body to stop or slow down
sweating.
7. Adaptive Advantage
Organisms can _________to the changing environments and therefore occupy
___________________, hence reducing ______________
The more advanced an animal’s ________________ systems, the greater its
chance of ______________with a changing environment = survival of organism
If _______________ processes can continue despite a _________________
environment, an organism is able to inhabit a wider range of habitats and
_____________ more successfully to maintain its population. = survival of species
8. Why Regulate Heat?
Chemical reactions occurring in cells are very ___________
_____________ that control cellular activity are heat-
sensitive
Many _________________can only function properly if
they float freely in the lipid bilayer, which is only possible
if it is liquid; at low temperature the bilayer ___________.
At around 85ºC, the ________________holding the two
strands of __________ together break, causing it to become
single stranded.
9. Why Regulate Heat
Enables mammals to successfully live in a wider variety of
habitats – reduces ______________________
Always ready for _____________; can be active at a variety of
times of day and night
Their __________ capacity is many times that of cold blooded
animals
Not greatly affected by __________temperatures.
Muscles provide ___________ power; capable of sustained
high activity.
10. How We Lose and Gain Heat
Body temperature is affected by the ____________, amount of
_________ (____________________________), BMI, illness, hydration,
______________
Heat can be gained or lost from any place where the body is in
______________ with the environment (skin and lungs)
Heat can be gained or lost by:
Conduction
Convection
Radiation
Evaporation
11. How is Temperature Monitored?
The _______________ in the brain monitors the
temperature of the __________ flowing through
it
This is called the _____________________as it
is sensing temperature at the _______ of the
body.
The hypothalamus receives information regarding
changes in external temperature from
__________________
There are two types of receptors, hot and cold.
______________relay the messages to and from
receptors and the hypothalamus and effector cells
12.
13.
14. Too Hot?
Nervous impulses send messages:
to the _____________ glands which start to sweat in
order to lower the body temperature through evaporation,
______________to lose heat through conduction
breathing rate ____________(brings more cooler air into
body)
____________lowering skin hairs letting more air flow
across skin to lose heat by convection and evaporation -
No ___________
Behavioral responses
Metabolic rate __________
15.
16. Sweating
When you are hot, ________________are stimulated
to release sweat.
Heat energy from your skin is used to turn the liquid
sweat into gas - sweat ______________
Because heat is lost, your___________ cools down as
does the _________ flowing past
Deep in the dermis are supplied by sympathetic nerve fibres.
In humans most sweat glands are eccrine glands and secrete a
dilute salt solution.
Sweat doesn’t work in a humid environment
Environmental temperature > body temp for sweating to be
effective
17. Vasodilation
Your blood carries most of the heat energy in your body.
There are small blood vessels called ___________ just underneath
your skin.
When you are hot, these capillaries get___________(dilate) so
more blood comes close to the surface of the skin and heat is lost.
This is why some people go _________when they are hot!
18. If the temperature
rises, the blood
vessel dilates (gets
bigger).
This means more heat is lost from the surface of the skin
19. Metabolic Rate
The ___________________changes through a reduction in the
secretion of thyroxine
This results in a ____________ in metabolic rate
The decrease in metabolic rate causes _____________to be produced
in the body
20. Behavioural Responses
We change our behavioural responses by:
_____________(decreasing activity)
staying in the shade
_______________________
wearing less clothing
________________
Submerging body in cold water
_____________________
Fanning ourselves
Chicks seek shade.
21. When the system fails…
If the body cannot lower its temperature it goes into a
_____________ STATE
Resulting in heat exhaustion ______________
Resulting in heat stroke over _____________
Often dehydration also occurs at the same time
________________
Red skin, no sweating, fever, disorientation, pinpoint pupils, shallow
breathing
_______________
Cooling blood and constricting blood vessels by submersing body in ice water
Stretch body out to increase surface area in contact with cool air
Move into shade
Remove clothing
Give cold fluids
Ice packs/wet towels
22. Fever
This is usually associated with _______________.
The immune system produces fever-inducing chemicals called
_____________, which travel through the blood to the
hypothalamus, where they trick it into raising the body
temperature.
________________________lower temperature by blocking the
production of pyrogens.
Apply cold wet clothes
Remove clothing
Seek medical care to treat infection – antibiotics for bacterial
infections
If left un treated person can have
___________________________.
25. Too Cold?
Nervous impulses send
messages:
to the sweat glands which stop any
_______________
blood vessels _____________ to prevent
the loss of heat through ______________
Blood circulates _____________and away
from extremities
breathing rate ______________
Glands secrete adrenaline and thyroxin to
____________ metabolic rate
metabolic rate increases (reactions
usually ________________)
Muscles _______________ – respiration
creates heat and friction
Muscles contract to make _____________
stand up and trap warm air against the
skin
26.
27. Vasoconstriction
This is basically the opposite of ____________________
When you are cold, the capillaries near the surface of your skin get
_______________(constrict) and some shut off.
This means _____________comes near the surface of the skin and less heat is
lost.
This is why your fingers and toes might go ____________ when they are cold!
is controlled by the sympathetic nervous system
decreases blood flow to the skin from internal organs, which
decreases the transfer of heat from the internal body organs to the skin
allows less heat to be lost from the body surface
cools the skin
VasodilationVasoconstriction
Cold day Hot day
28. Frostbite
The blood vessels in the skin _____________in very cold conditions to preserve
heat.
If this is prolonged it ____________the cells peripheral tissue of nutrient and
heat. When nerve cells stop working no signals get sent to the brain, the fingers
and toes go numb.
If this happens for a short time it can be reversed. If it happens for longer the
___________________i.e. frostbite
29. Metabolism
The _____________________stimulates the adrenal medulla via sympathetic
nerves
The ____________ secretes adrenaline and noradrenaline into the blood
This increases ________________, increasing heat production
This process helps maintain internal body temperature
Shivering
Shivering is actually __________________________occurring at a rate of
around ten to twenty per second
The ______________________ stimulates parts of the brain that increase
skeletal muscle tone
This increases body _________________________
30. Piloerection
When you are cold, small muscles in the skin are activated making
the_____________on your skin stand up.
The hairs trap a layer of air next to the skin, which is warmed by body heat and
becomes an ______________________preventing air flow to the skin and
slows heat loss
This is sometimes called ‘_______________or ‘ piloerection’
Skin
Hairs
Trapped air
forms
insulation
31. hair lies flat on
the skin
the muscle is
hair stands up and a
goose bump appears
the muscle
body temperature
normal
body temperature falls
32. Behavioural Responses
We change our behavioural responses by:
__________________
curling into a ball
putting on more ____________
using a heating device
Eating/drinking ____________________
Exercising to create heat
Moving out of cold – __________________
34. When the system fails…
If this is ineffective at heating the body goes into a
________________________
When core body temperature drops below __________
Metabolic activity ______________
_______________
Shivering, skin looks blue (especially lips)
Slowing of heart rate, breathing rate, blood pressure decreases
Confusion, difficulty walking
Frost bite, chill blains
_________________
Shelter, more dry clothing, warm drinks – not alcohol
Hot water bottle, foil blanket, hot bath
It is important that the return to normal temperature occurs slowly and
from the core out
If left untreated ______________ occurs
38. Effector Response to low temperature Response to high temperature
Smooth muscles in
peripheral arterioles in
the skin.
Muscles contract causing vasoconstriction. Less
heat is carried from the core to the surface of the
body, maintaining core temperature. Extremities
can turn blue and feel cold and can even be
damaged (frostbite).
Muscles relax causing vasodilation. More heat is
carried from the core to the surface, where it is lost
by convection and radiation. Skin turns red.
Sweat glands No sweat produced. Glands secrete sweat onto surface of skin, where it
evaporates. This is an endothermic process and
water has a high latent heat of evaporation, so it
takes heat from the body.
Erector pili muscles in
skin
(attached to skin hairs)
Muscles contract, raising skin hairs and trapping an
insulating layer of still, warm air next to the skin.
Not very effective in humans, just causing
“goosebumps”.
Muscles relax, lowering the skin hairs and allowing
air to circulate over the skin, encouraging
convection and evaporation.
Skeletal muscles Muscles contract and relax repeatedly, generating
heat by friction and from metabolic reactions.
No shivering.
Adrenal and thyroid
glands
Glands secrete adrenaline and thyroxine
respectively, which increase the metabolic rate in
different tissues, especially the liver, so generating
heat.
Glands stop releasing adrenaline and thyroxine.
Behaviour Curling up, huddling, finding shelter, putting on
more clothes.
Stretching out, finding shade, swimming, removing
clothes.
40. 6 Steps to Effective Paraphrasing
1. Reread the original passage until you understand its full meaning.
2. Set the original aside, and write your paraphrase on a note card.
3. Jot down a few words below your paraphrase to remind you later how you envision using this material. At the
top of the note card, write a key word or phrase to indicate the subject of your paraphrase.
4. Check your rendition with the original to make sure that your version accurately expresses all the essential
information in a new form.
5. Use quotation marks to identify any unique term or phraseology you have borrowed exactly from the source.
6. Record the source (including the page) on your note card so that you can credit it easily if you decide to
incorporate the material into your paper.
41. Example of Paraphrasing
The original passage:
Students frequently overuse direct quotation in taking notes, and as a result they overuse quotations in the
final [research] paper. Probably only about 10% of your final manuscript should appear as directly quoted
matter. Therefore, you should strive to limit the amount of exact transcribing of source materials while
taking notes. Lester, James D. Writing Research Papers. 2nd ed. (1976): 46-47.
A legitimate paraphrase:
In research papers students often quote excessively, failing to keep quoted material down to a desirable
level. Since the problem usually originates during note taking, it is essential to minimize the material
recorded verbatim (Lester 46-47).
An acceptable summary:
Students should take just a few notes in direct quotation from sources to help minimize the amount of
quoted material in a research paper (Lester 46-47).
A plagiarized version:
Students often use too many direct quotations when they take notes, resulting in too many of them in the
final research paper. In fact, probably only about 10% of the final copy should consist of directly quoted
material. So it is important to limit the amount of source material copied while taking notes.
42. Now What?
Now you have a basic understanding of thermoregulation
Next you need to go to the moodle and complete the rest of the pre learning
activities, while you do these you need to be filling in the research table in
google docs
Any questions not completed after completing the moodle prelearning you will
need to go and find the answers to on your own
Print off the completed google table and bring it to class
Make a bibliography of your references, print it off along with any diagrams you
want to use and bring them to class
Use your notes to complete the report write up based on a scenario on
thermoregulation