The plasma membrane forms the outer boundary of the cell and is selectively permeable. It regulates communication between the cell's interior and exterior environments. The cytoplasm contains the cytosol and various organelles. The cytosol is the intracellular fluid that contains dissolved nutrients, waste products, and cytoskeletal elements. It is the site of many cellular chemical reactions. The nucleus houses the cell's DNA within chromosomes and controls most cellular functions. Nutrients and waste diffuse across the membrane, while the cell maintains concentrations using membrane transport proteins and cellular energy.
The cell membrane regulates what enters and leaves the cell to maintain homeostasis. It is made up of a phospholipid bilayer with proteins embedded. There are three main types of transport across the membrane - simple diffusion, facilitated diffusion, and active transport. Simple diffusion moves molecules down their concentration gradient without energy, while active transport moves molecules against their gradient using ATP energy.
The cell membrane regulates what enters and leaves the cell to maintain homeostasis. It is made up of a phospholipid bilayer with proteins embedded. There are three main types of transport across the membrane - simple diffusion, facilitated diffusion, and active transport. Simple diffusion moves molecules down their concentration gradient without energy, while active transport moves molecules against their gradient and requires ATP.
The document provides an overview of the cellular level of organization, including key concepts such as:
- Cells are the basic unit of structure and function in living things, and all cells contain a plasma membrane, cytoplasm, and nucleus.
- The plasma membrane is selectively permeable and regulates what enters and exits the cell. Transport across the membrane includes passive diffusion and active transport processes.
- The cytoplasm contains cytosol and various organelles that carry out specialized functions. Organelles include the endoplasmic reticulum, Golgi complex, lysosomes, mitochondria and more.
- The nucleus houses the cell's DNA within chromosomes and controls gene expression through transcription and translation. Cell division occurs through mitosis and
The cell membrane forms the boundary of cells and is semi-permeable, regulating what enters and leaves. It is composed of a phospholipid bilayer with proteins embedded. Molecules move across the membrane through diffusion, osmosis, and active or facilitated transport. Transport proteins act as carriers and may require energy to move molecules against concentration gradients or use gradients to transport other molecules.
This presentation is about various types of cell transport mechanism which occurs at cellular level within the body. This is a basic presentation, intended for first year students of Medical and Health science courses .
This document summarizes different types of transport mechanisms across cell membranes, including passive transport through diffusion and osmosis, as well as active transport using membrane pumps and vesicles. Passive transport moves substances according to concentration gradients and does not require energy, while active transport moves substances against gradients by using cellular energy in the form of ATP. Key transport mechanisms discussed include facilitated diffusion, ion channels, the sodium-potassium pump, endocytosis, and exocytosis.
Body Systems: Homeostasis, blood, cardio and respiratorymeducationdotnet
- The cell membrane is a phospholipid bilayer that separates the intracellular and extracellular fluids and controls the movement of substances into and out of cells. Transport proteins allow selective uptake of nutrients and removal of waste.
- Water movement across the membrane is determined by osmosis, moving from low to high solute concentration areas. Osmotic pressure and tonicity regulate water distribution and fluid balance in the body.
- The glycocalyx layer contains carbohydrates that protect the cell membrane and aid processes like cell adhesion and immune response.
The cell membrane regulates what enters and leaves the cell to maintain homeostasis. It is made up of a phospholipid bilayer with proteins embedded. There are three main types of transport across the membrane - simple diffusion, facilitated diffusion, and active transport. Simple diffusion moves molecules down their concentration gradient without energy, while active transport moves molecules against their gradient using ATP energy.
The cell membrane regulates what enters and leaves the cell to maintain homeostasis. It is made up of a phospholipid bilayer with proteins embedded. There are three main types of transport across the membrane - simple diffusion, facilitated diffusion, and active transport. Simple diffusion moves molecules down their concentration gradient without energy, while active transport moves molecules against their gradient and requires ATP.
The document provides an overview of the cellular level of organization, including key concepts such as:
- Cells are the basic unit of structure and function in living things, and all cells contain a plasma membrane, cytoplasm, and nucleus.
- The plasma membrane is selectively permeable and regulates what enters and exits the cell. Transport across the membrane includes passive diffusion and active transport processes.
- The cytoplasm contains cytosol and various organelles that carry out specialized functions. Organelles include the endoplasmic reticulum, Golgi complex, lysosomes, mitochondria and more.
- The nucleus houses the cell's DNA within chromosomes and controls gene expression through transcription and translation. Cell division occurs through mitosis and
The cell membrane forms the boundary of cells and is semi-permeable, regulating what enters and leaves. It is composed of a phospholipid bilayer with proteins embedded. Molecules move across the membrane through diffusion, osmosis, and active or facilitated transport. Transport proteins act as carriers and may require energy to move molecules against concentration gradients or use gradients to transport other molecules.
This presentation is about various types of cell transport mechanism which occurs at cellular level within the body. This is a basic presentation, intended for first year students of Medical and Health science courses .
This document summarizes different types of transport mechanisms across cell membranes, including passive transport through diffusion and osmosis, as well as active transport using membrane pumps and vesicles. Passive transport moves substances according to concentration gradients and does not require energy, while active transport moves substances against gradients by using cellular energy in the form of ATP. Key transport mechanisms discussed include facilitated diffusion, ion channels, the sodium-potassium pump, endocytosis, and exocytosis.
Body Systems: Homeostasis, blood, cardio and respiratorymeducationdotnet
- The cell membrane is a phospholipid bilayer that separates the intracellular and extracellular fluids and controls the movement of substances into and out of cells. Transport proteins allow selective uptake of nutrients and removal of waste.
- Water movement across the membrane is determined by osmosis, moving from low to high solute concentration areas. Osmotic pressure and tonicity regulate water distribution and fluid balance in the body.
- The glycocalyx layer contains carbohydrates that protect the cell membrane and aid processes like cell adhesion and immune response.
MV MLT 102 UNIT 1-STRUCTURE AND FUCTION OF CELL MEMBRANE.pptxRuchikaMaurya4
The plasma membrane regulates what enters and exits the cell. It is made up of a lipid bilayer with proteins embedded within it. The fluid mosaic model describes the plasma membrane structure as a fluid bilayer with proteins that move freely within. Materials pass through the membrane via diffusion, facilitated diffusion, active transport, endocytosis, and exocytosis. Transport proteins help move substances across the membrane against a concentration gradient through active transport.
The document discusses various modes of transport across the cell membrane, including passive transport mechanisms like simple diffusion and facilitated diffusion, active transport processes like primary active transport and secondary active transport, and vesicular transport mechanisms like endocytosis, exocytosis, and transcytosis. Transport across the cell membrane is essential for cellular functions and is mediated by integral membrane proteins like ion channels and carrier proteins.
Topic : Membrane transport: Transport of water, ion and biomoleculesAJAYSOJITRA6
TOPIC WILL BE CONSIDER…..
TRANSPORT MECHANISM ; TYPES
PASSIVE PROCESS: DIFFUSION,OSMOSIS,PASSIVE TRANSPORT, FACILLATED TRANSPORT
ACTIVE PROCESS: ACTIVE TRANSPORT, ENDOCYTOSIS, EXOCYTOSIS
ENDOCYTOSIS: PINOCYTOSIS,ENDOCYTOSIS
This document provides an overview of cell membrane transport. It discusses the fluid mosaic model of the cell membrane and describes the various transport mechanisms like passive transport, facilitated diffusion, active transport, and endocytosis and exocytosis. It explains the structures involved in transport like membrane proteins, channels, carriers and pumps. It also differentiates between osmoregulation in plant and animal cells and the importance of selective permeability and maintaining ion gradients.
Cell (Cellular level of organization) for B.Pharm Sem 1st.pptxMrSALAJKHARE
The document summarizes key aspects of cell structure and function. It describes the typical cell as having three main parts - the plasma membrane, cytoplasm, and nucleus. The plasma membrane forms the outer boundary of the cell using a lipid bilayer structure. Transport across the plasma membrane can occur passively through diffusion or actively through processes requiring energy. Both passive and active transport are essential for exchanging materials and maintaining concentrations inside and outside the cell.
This document provides information on transport across cell membranes. It begins by outlining the key topics to be covered, including the importance of cell membranes, types of transport mechanisms, and details on active transport. It then discusses the structure of the cell membrane and defines different types of transport mechanisms, including passive transport mechanisms like diffusion, facilitated diffusion, and osmosis. Finally, it provides more details on active transport mechanisms, distinguishing between primary and secondary active transport. In summary, the document serves as an introduction to transport across cell membranes, covering both passive and active transport mechanisms at a high level.
The document discusses cellular transport processes across the plasma membrane. It begins by explaining that the plasma membrane is selectively permeable, allowing some substances to pass through more readily than others based on their hydrophobicity. There are three main types of transport - passive, which moves down concentration gradients without energy expenditure; active, which moves against gradients by using cellular energy; and transport in vesicles. Key passive processes include simple diffusion, facilitated diffusion via channels and carriers, and osmosis. The sodium-potassium pump is highlighted as a major active transport mechanism using ATP. Secondary active transport also harnesses ion gradients. Endocytosis, exocytosis, and transcytosis are described as vesicle-based transport methods.
The plasma membrane surrounds and protects the cell, and is made up of a lipid bilayer with embedded proteins. It regulates what passes in and out of the cell through diffusion, channels, carriers, and active transport. The cytoplasm contains organelles like the endoplasmic reticulum, ribosomes, Golgi apparatus, lysosomes, and mitochondria that carry out specialized functions. The nucleus houses the cell's DNA and directs protein synthesis. Together, these structures and transport mechanisms allow the cell to maintain homeostasis and carry out its functions.
This document discusses the structure and functions of the cell. It divides the cell into three main parts - the plasma membrane, cytoplasm, and nucleus. The plasma membrane forms the outer boundary of the cell and is selectively permeable. The cytoplasm contains the cytosol and various organelles. Key organelles include the nucleus, which houses the cell's DNA, and mitochondria, which generate energy. Materials move across the plasma membrane through passive diffusion, facilitated diffusion, active transport, and osmosis. Transport proteins help move substances against concentration gradients using cellular energy.
This document discusses cell membrane transport mechanisms. It begins by explaining that plasma membranes are selectively permeable, allowing some substances to pass through freely via diffusion while requiring special transport proteins for others. It then examines different transport mechanisms in detail. These include passive transport processes like diffusion and facilitated transport via channel or carrier proteins, as well as active transport processes. Osmosis is discussed as a type of diffusion dependent on a water concentration gradient. The concepts of tonicity, osmolarity, and their effects on cell volume are also covered. The document seeks to explain the key functions and factors involved in transport across the cell membrane.
Structure and functions of cell, transport across cell membrane, cell
division, cell junctions. General principles of cell communication,
the smallest unit that can live on its own and that makes up all living organisms and the tissues of the body
The basic tenets of the cell theory are as follows:
All living things are made up of one or more cells.
The cell is the structural and functional unit of all living things.
Cells come from pre-existing cells through the process of division.
All cells are the same in regard to chemical composition.
Cells also communicate with each other. Whether in plants, humans, or animals, they connect to create a solid, well formed organism. In humans, cells build tissues, tissues form organs, and organs work together to keep the body alive.
Experts estimate that there are around 200Trusted Source cell types in the human body.
The plasma membrane is a selectively permeable membrane that surrounds the cell. It is composed of a phospholipid bilayer with embedded proteins. The fluid mosaic model describes the plasma membrane structure, with integral and peripheral proteins embedded within or attached to the phospholipid bilayer. The plasma membrane regulates what enters and exits the cell through diffusion, osmosis, facilitated diffusion, active transport, endocytosis, and exocytosis. It also contains proteins that act as carriers, channels, pumps, receptors, enzymes, and adhesion molecules that perform important cell functions.
This document summarizes various modes of transport across cell membranes, including passive and active transport. Passive transport includes simple diffusion, facilitated diffusion, and osmosis. Active transport involves primary active transport via pumps like the sodium-potassium pump and secondary active transport using ion gradients. The document also discusses vesicular transport, which moves materials via endocytosis and exocytosis using vesicles. It provides examples and characteristics of different transport mechanisms, as well as factors that influence rates of diffusion and osmosis.
This document summarizes various transport mechanisms in cells, including passive transport (simple diffusion, facilitated diffusion, and osmosis) and active transport. It describes the key features and examples of different transport systems like uniport, symport, antiport, ion channels, and pumps. It also discusses the role of osmosis in biological systems and applications of diffusion, osmosis, and reverse osmosis. In summary, the document provides an overview of the different mechanisms by which substances move across cell membranes.
The plasma membrane is a selectively permeable membrane that surrounds the cell. It is composed of a phospholipid bilayer with embedded proteins. The fluid mosaic model from 1972 describes the plasma membrane as a fluid bilayer with integral proteins embedded within it, peripheral proteins attached to its surface, and lipid-anchored proteins. The plasma membrane regulates what enters and exits the cell through diffusion, osmosis, facilitated diffusion using channel proteins, and active transport using carrier proteins that require ATP. Endocytosis and exocytosis allow bulk transport across the membrane through vesicles.
The document discusses the structure and function of the plasma membrane and the movement of substances across it. The plasma membrane is a selectively permeable phospholipid bilayer that controls the movement of substances into and out of cells. Substances can move passively via simple diffusion, facilitated diffusion, or osmosis. Active transport requires energy and transports substances against a concentration gradient using carrier proteins.
The document discusses the structure and function of the plasma membrane and the movement of substances across it. The plasma membrane is a selectively permeable phospholipid bilayer that controls the movement of substances into and out of cells. Substances can move passively via simple diffusion, facilitated diffusion, or osmosis. Active transport requires energy and transports molecules against a concentration gradient using carrier proteins.
This document outlines the process of establishing a nutritional surveillance system. It discusses the purpose of nutritional surveillance, which is to monitor nutrition situations, identify malnutrition factors, and inform policies. The document describes the history of nutritional surveillance and challenges in establishing sustainable systems. It provides details on indicators, data collection methods, analysis, interpretation and dissemination of nutritional surveillance data.
The nervous system consists of two main parts - the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS contains the brain and spinal cord, while the PNS contains nerves that connect the CNS to the rest of the body. The structures that make up the nervous system include neurons, neuroglia, the brain, spinal cord, cranial and spinal nerves. Neurons are specialized to conduct electrical signals, while neuroglia provide support and insulation to the neurons. The spinal cord is protected within the bony vertebral column and surrounded by three layers of meninges.
MV MLT 102 UNIT 1-STRUCTURE AND FUCTION OF CELL MEMBRANE.pptxRuchikaMaurya4
The plasma membrane regulates what enters and exits the cell. It is made up of a lipid bilayer with proteins embedded within it. The fluid mosaic model describes the plasma membrane structure as a fluid bilayer with proteins that move freely within. Materials pass through the membrane via diffusion, facilitated diffusion, active transport, endocytosis, and exocytosis. Transport proteins help move substances across the membrane against a concentration gradient through active transport.
The document discusses various modes of transport across the cell membrane, including passive transport mechanisms like simple diffusion and facilitated diffusion, active transport processes like primary active transport and secondary active transport, and vesicular transport mechanisms like endocytosis, exocytosis, and transcytosis. Transport across the cell membrane is essential for cellular functions and is mediated by integral membrane proteins like ion channels and carrier proteins.
Topic : Membrane transport: Transport of water, ion and biomoleculesAJAYSOJITRA6
TOPIC WILL BE CONSIDER…..
TRANSPORT MECHANISM ; TYPES
PASSIVE PROCESS: DIFFUSION,OSMOSIS,PASSIVE TRANSPORT, FACILLATED TRANSPORT
ACTIVE PROCESS: ACTIVE TRANSPORT, ENDOCYTOSIS, EXOCYTOSIS
ENDOCYTOSIS: PINOCYTOSIS,ENDOCYTOSIS
This document provides an overview of cell membrane transport. It discusses the fluid mosaic model of the cell membrane and describes the various transport mechanisms like passive transport, facilitated diffusion, active transport, and endocytosis and exocytosis. It explains the structures involved in transport like membrane proteins, channels, carriers and pumps. It also differentiates between osmoregulation in plant and animal cells and the importance of selective permeability and maintaining ion gradients.
Cell (Cellular level of organization) for B.Pharm Sem 1st.pptxMrSALAJKHARE
The document summarizes key aspects of cell structure and function. It describes the typical cell as having three main parts - the plasma membrane, cytoplasm, and nucleus. The plasma membrane forms the outer boundary of the cell using a lipid bilayer structure. Transport across the plasma membrane can occur passively through diffusion or actively through processes requiring energy. Both passive and active transport are essential for exchanging materials and maintaining concentrations inside and outside the cell.
This document provides information on transport across cell membranes. It begins by outlining the key topics to be covered, including the importance of cell membranes, types of transport mechanisms, and details on active transport. It then discusses the structure of the cell membrane and defines different types of transport mechanisms, including passive transport mechanisms like diffusion, facilitated diffusion, and osmosis. Finally, it provides more details on active transport mechanisms, distinguishing between primary and secondary active transport. In summary, the document serves as an introduction to transport across cell membranes, covering both passive and active transport mechanisms at a high level.
The document discusses cellular transport processes across the plasma membrane. It begins by explaining that the plasma membrane is selectively permeable, allowing some substances to pass through more readily than others based on their hydrophobicity. There are three main types of transport - passive, which moves down concentration gradients without energy expenditure; active, which moves against gradients by using cellular energy; and transport in vesicles. Key passive processes include simple diffusion, facilitated diffusion via channels and carriers, and osmosis. The sodium-potassium pump is highlighted as a major active transport mechanism using ATP. Secondary active transport also harnesses ion gradients. Endocytosis, exocytosis, and transcytosis are described as vesicle-based transport methods.
The plasma membrane surrounds and protects the cell, and is made up of a lipid bilayer with embedded proteins. It regulates what passes in and out of the cell through diffusion, channels, carriers, and active transport. The cytoplasm contains organelles like the endoplasmic reticulum, ribosomes, Golgi apparatus, lysosomes, and mitochondria that carry out specialized functions. The nucleus houses the cell's DNA and directs protein synthesis. Together, these structures and transport mechanisms allow the cell to maintain homeostasis and carry out its functions.
This document discusses the structure and functions of the cell. It divides the cell into three main parts - the plasma membrane, cytoplasm, and nucleus. The plasma membrane forms the outer boundary of the cell and is selectively permeable. The cytoplasm contains the cytosol and various organelles. Key organelles include the nucleus, which houses the cell's DNA, and mitochondria, which generate energy. Materials move across the plasma membrane through passive diffusion, facilitated diffusion, active transport, and osmosis. Transport proteins help move substances against concentration gradients using cellular energy.
This document discusses cell membrane transport mechanisms. It begins by explaining that plasma membranes are selectively permeable, allowing some substances to pass through freely via diffusion while requiring special transport proteins for others. It then examines different transport mechanisms in detail. These include passive transport processes like diffusion and facilitated transport via channel or carrier proteins, as well as active transport processes. Osmosis is discussed as a type of diffusion dependent on a water concentration gradient. The concepts of tonicity, osmolarity, and their effects on cell volume are also covered. The document seeks to explain the key functions and factors involved in transport across the cell membrane.
Structure and functions of cell, transport across cell membrane, cell
division, cell junctions. General principles of cell communication,
the smallest unit that can live on its own and that makes up all living organisms and the tissues of the body
The basic tenets of the cell theory are as follows:
All living things are made up of one or more cells.
The cell is the structural and functional unit of all living things.
Cells come from pre-existing cells through the process of division.
All cells are the same in regard to chemical composition.
Cells also communicate with each other. Whether in plants, humans, or animals, they connect to create a solid, well formed organism. In humans, cells build tissues, tissues form organs, and organs work together to keep the body alive.
Experts estimate that there are around 200Trusted Source cell types in the human body.
The plasma membrane is a selectively permeable membrane that surrounds the cell. It is composed of a phospholipid bilayer with embedded proteins. The fluid mosaic model describes the plasma membrane structure, with integral and peripheral proteins embedded within or attached to the phospholipid bilayer. The plasma membrane regulates what enters and exits the cell through diffusion, osmosis, facilitated diffusion, active transport, endocytosis, and exocytosis. It also contains proteins that act as carriers, channels, pumps, receptors, enzymes, and adhesion molecules that perform important cell functions.
This document summarizes various modes of transport across cell membranes, including passive and active transport. Passive transport includes simple diffusion, facilitated diffusion, and osmosis. Active transport involves primary active transport via pumps like the sodium-potassium pump and secondary active transport using ion gradients. The document also discusses vesicular transport, which moves materials via endocytosis and exocytosis using vesicles. It provides examples and characteristics of different transport mechanisms, as well as factors that influence rates of diffusion and osmosis.
This document summarizes various transport mechanisms in cells, including passive transport (simple diffusion, facilitated diffusion, and osmosis) and active transport. It describes the key features and examples of different transport systems like uniport, symport, antiport, ion channels, and pumps. It also discusses the role of osmosis in biological systems and applications of diffusion, osmosis, and reverse osmosis. In summary, the document provides an overview of the different mechanisms by which substances move across cell membranes.
The plasma membrane is a selectively permeable membrane that surrounds the cell. It is composed of a phospholipid bilayer with embedded proteins. The fluid mosaic model from 1972 describes the plasma membrane as a fluid bilayer with integral proteins embedded within it, peripheral proteins attached to its surface, and lipid-anchored proteins. The plasma membrane regulates what enters and exits the cell through diffusion, osmosis, facilitated diffusion using channel proteins, and active transport using carrier proteins that require ATP. Endocytosis and exocytosis allow bulk transport across the membrane through vesicles.
The document discusses the structure and function of the plasma membrane and the movement of substances across it. The plasma membrane is a selectively permeable phospholipid bilayer that controls the movement of substances into and out of cells. Substances can move passively via simple diffusion, facilitated diffusion, or osmosis. Active transport requires energy and transports substances against a concentration gradient using carrier proteins.
The document discusses the structure and function of the plasma membrane and the movement of substances across it. The plasma membrane is a selectively permeable phospholipid bilayer that controls the movement of substances into and out of cells. Substances can move passively via simple diffusion, facilitated diffusion, or osmosis. Active transport requires energy and transports molecules against a concentration gradient using carrier proteins.
This document outlines the process of establishing a nutritional surveillance system. It discusses the purpose of nutritional surveillance, which is to monitor nutrition situations, identify malnutrition factors, and inform policies. The document describes the history of nutritional surveillance and challenges in establishing sustainable systems. It provides details on indicators, data collection methods, analysis, interpretation and dissemination of nutritional surveillance data.
The nervous system consists of two main parts - the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS contains the brain and spinal cord, while the PNS contains nerves that connect the CNS to the rest of the body. The structures that make up the nervous system include neurons, neuroglia, the brain, spinal cord, cranial and spinal nerves. Neurons are specialized to conduct electrical signals, while neuroglia provide support and insulation to the neurons. The spinal cord is protected within the bony vertebral column and surrounded by three layers of meninges.
Hormones are chemical messengers that are secreted into the bloodstream by endocrine glands and target specific organs. The endocrine system regulates bodily functions through hormones, while the nervous system uses nerves. There are two main types of hormones - lipid-soluble hormones like steroids which diffuse through cell membranes, and water-soluble hormones like peptides which bind to surface receptors. Major endocrine glands include the pituitary, thyroid, parathyroids, pancreas, adrenals, ovaries/testes, which regulate growth, metabolism, sexual development, and other processes. Hormones bind to receptors on target cells and trigger physiological responses through various mechanisms of action.
This document provides an overview of human anatomy and physiology. It discusses the levels of structural organization in the body from molecules to organ systems. It also covers characteristics of life like metabolism, responsiveness, movement, growth, differentiation, and reproduction. Key concepts like homeostasis, feedback loops, body cavities, membranes, and the requirements of organisms are explained. The major organ systems and how they work together to support the characteristics of life is described.
Vitamin D is an essential nutrient that plays an important role in bone health. It helps regulate the amount of calcium and phosphate in the body which are needed to keep bones, teeth and muscles healthy and strong. Vitamin D is sometimes called the "sunshine vitamin" because the body produces it naturally when exposed to sunlight.
Minerals are inorganic compounds required by the body as nutrients. There are two types of minerals - macro minerals which are needed in amounts over 100mg/day like calcium, phosphorus, magnesium, and micro minerals needed in smaller amounts like iron, zinc, and selenium. Sodium, potassium, calcium, phosphorus, and magnesium are some of the major minerals discussed in the document in terms of their sources, recommended daily intake, absorption, functions, regulation, and disorders caused by deficiency or excess.
This document summarizes the key components and properties of dietary fibre. It discusses the different types of soluble and insoluble fibre, their sources, and how they function in the gastrointestinal tract. Specifically, it describes how soluble fibres can increase viscosity and water holding capacity in the gut, slowing digestion and nutrient absorption. It also explains how fibres can bind to enzymes, lipids, and bile acids in the GI tract, reducing their absorption and increasing excretion.
Zinc is an essential micromineral that is present in all cells and tissues of the body. It plays important roles in growth, development, immunity, and the metabolism of protein and nucleic acids. The recommended daily allowance of zinc varies depending on age and gender. Good dietary sources include oysters, meat, poultry, eggs, dairy products, and nuts. Both zinc deficiency and toxicity can cause health issues, with deficiency linked to impaired growth and development.
The document discusses carbohydrates and their classification. It defines carbohydrates as polyhydroxy aldehydes or ketones, or compounds that can be hydrolyzed to them. Carbohydrates are classified as monosaccharides, disaccharides, oligosaccharides, and polysaccharides depending on the number of monomeric units. Monosaccharides include aldoses and ketoses containing 3 to 7 carbon atoms. Common monosaccharides are glucose, fructose, and galactose. Disaccharides are formed from two monosaccharide units joined by a glycosidic bond, such as sucrose, lactose, and maltose. Polysaccharides have more than 10 monomeric units and include starch
The document provides information on metabolic pathways including glycolysis, the citric acid cycle, and the electron transport chain. It begins with an overview of glycolysis, including its two phases and location in the cytoplasm. Key details are provided on the regulation of three glycolytic enzymes: hexokinase, PFK-1, and pyruvate kinase. The document then discusses the fates of pyruvate, including its conversion to acetyl-CoA and entry into the citric acid cycle or fermentation pathways. An overview of the citric acid cycle follows, along with its regulation and role in ATP production. The electron transport chain is then introduced, along with the structures and functions of its four complexes. In summary
This document provides information on digestion and nutrition. It discusses the nutrients required by the body and the roles and structures of the gastrointestinal tract and accessory organs involved in digestion. The gastrointestinal tract consists of the mouth, esophagus, stomach, small intestine, large intestine and anus. Accessory organs include teeth, salivary glands, liver, gallbladder and pancreas. Food is broken down mechanically and chemically by these organs to absorb nutrients into the bloodstream.
A review of the growth of the Israel Genealogy Research Association Database Collection for the last 12 months. Our collection is now passed the 3 million mark and still growing. See which archives have contributed the most. See the different types of records we have, and which years have had records added. You can also see what we have for the future.
How to Fix the Import Error in the Odoo 17Celine George
An import error occurs when a program fails to import a module or library, disrupting its execution. In languages like Python, this issue arises when the specified module cannot be found or accessed, hindering the program's functionality. Resolving import errors is crucial for maintaining smooth software operation and uninterrupted development processes.
Strategies for Effective Upskilling is a presentation by Chinwendu Peace in a Your Skill Boost Masterclass organisation by the Excellence Foundation for South Sudan on 08th and 09th June 2024 from 1 PM to 3 PM on each day.
How to Add Chatter in the odoo 17 ERP ModuleCeline George
In Odoo, the chatter is like a chat tool that helps you work together on records. You can leave notes and track things, making it easier to talk with your team and partners. Inside chatter, all communication history, activity, and changes will be displayed.
Main Java[All of the Base Concepts}.docxadhitya5119
This is part 1 of my Java Learning Journey. This Contains Custom methods, classes, constructors, packages, multithreading , try- catch block, finally block and more.
Exploiting Artificial Intelligence for Empowering Researchers and Faculty, In...Dr. Vinod Kumar Kanvaria
Exploiting Artificial Intelligence for Empowering Researchers and Faculty,
International FDP on Fundamentals of Research in Social Sciences
at Integral University, Lucknow, 06.06.2024
By Dr. Vinod Kumar Kanvaria
The simplified electron and muon model, Oscillating Spacetime: The Foundation...RitikBhardwaj56
Discover the Simplified Electron and Muon Model: A New Wave-Based Approach to Understanding Particles delves into a groundbreaking theory that presents electrons and muons as rotating soliton waves within oscillating spacetime. Geared towards students, researchers, and science buffs, this book breaks down complex ideas into simple explanations. It covers topics such as electron waves, temporal dynamics, and the implications of this model on particle physics. With clear illustrations and easy-to-follow explanations, readers will gain a new outlook on the universe's fundamental nature.
This slide is special for master students (MIBS & MIFB) in UUM. Also useful for readers who are interested in the topic of contemporary Islamic banking.
Walmart Business+ and Spark Good for Nonprofits.pdfTechSoup
"Learn about all the ways Walmart supports nonprofit organizations.
You will hear from Liz Willett, the Head of Nonprofits, and hear about what Walmart is doing to help nonprofits, including Walmart Business and Spark Good. Walmart Business+ is a new offer for nonprofits that offers discounts and also streamlines nonprofits order and expense tracking, saving time and money.
The webinar may also give some examples on how nonprofits can best leverage Walmart Business+.
The event will cover the following::
Walmart Business + (https://business.walmart.com/plus) is a new shopping experience for nonprofits, schools, and local business customers that connects an exclusive online shopping experience to stores. Benefits include free delivery and shipping, a 'Spend Analytics” feature, special discounts, deals and tax-exempt shopping.
Special TechSoup offer for a free 180 days membership, and up to $150 in discounts on eligible orders.
Spark Good (walmart.com/sparkgood) is a charitable platform that enables nonprofits to receive donations directly from customers and associates.
Answers about how you can do more with Walmart!"
This presentation includes basic of PCOS their pathology and treatment and also Ayurveda correlation of PCOS and Ayurvedic line of treatment mentioned in classics.
3. Plasma Membrane
◼ forms the cell’s flexible outer surface, separating the cell’s internal environment
(inside the cell) from the external environment (outside the cell).
◼ Selective barrier
◼ communication among cells and between cells and their external environment.
Cytoplasm
◼ consists of all the cellular contents between the plasma membrane and the nucleus
◼ Cytosol: The fluid portion: contains water, dissolved solutes, and suspended particles
Nucleus
◼ houses most of a cell’s DNA.
◼ Chromosome: a single molecule of DNA associated with several proteins, contains
thousands of hereditary units called genes that control most aspects of cellular
structure and function.
4. Plasma Membrane: structure
Lipid bilayer
3 types of lipid:
75% Phospholipid,
20% cholesterol,
5% glycolipids
Amphipathic
molecules: dual
nature
Lipid
Integral Protein
[Transmembrane
Protein]
Peripheral Protein
Modification of
Protein
1. Glycoprotein
2. Lipoprotein
Protein
5. Glycocalyx
◼ The carbohydrate portions of glycolipids and glycoproteins form
an extensive sugary coat.
◼ Cell to cell pattern varies
◼ The glycocalyx acts like a molecular “signature” that enables
cells to recognize one another.
◼ One of the basis of the immune response that helps us destroy
invading organisms.
◼ enables cells to adhere to one another in some tissues and
protects cells from being digested by enzymes in the extracellular
fluid.
◼ The hydrophilic properties of the glycocalyx attract a film of
fluid to the surface of many cells.
6. Function of Membrane Protein
Act as,
◼ Ion Channels
◼ Carriers
◼ Receptor
◼ Enzyme
◼ Linker
◼ Cell identity marker
7. 1. Membrane Fluidity
◼ lipid molecules readily exchange places with
their neighbors within a monolayer (~107 times
a second).
◼ This gives rise to a rapid lateral diffusion,
10million times per second
◼ It depends on number of cholesterol and double-
bond [kink] present in fatty acids
◼ "flip-flop" : occurs less than once a month for
any individual molecule.
Membrane Physiology
8. Importance of membrane Fluidity
◼ Rigid membrane would lack mobility
◼ A completely fluid membrane would lack the
structural organization and mechanical support
required by the cell
◼ Allows interactions to occur within the plasma
membrane enables the movement of the membrane
components responsible for cellular processes such as
cell movement, growth, division, and secretion.
◼ self-seal if torn or punctured.
9. 2. Membrane Permeability
◼ Selectively permeable
◼ permeable to nonpolar, uncharged molecules, such as oxygen,
carbon dioxide, and steroids
◼ Impermeable to ions and large, uncharged polar molecules
such as glucose
◼ Slightly permeable to small, uncharged polar molecules such
as water and urea, a waste product from the breakdown of
amino acids.
◼ Importance: allows a living cell to maintain different
concentrations of certain substances on either side of the
plasma membrane.
10. 3. Electrochemical Gradient
◼ The selective permeability of the plasma membrane allows a living cell to
maintain different concentrations of certain substances on either side of the
plasma membrane.
A concentration gradient is a difference in the concentration of a
chemical from the inside to the outside of the plasma membrane.
◼ Typically, the inner surface of the plasma membrane is more negatively
charged and the outer surface is more positively charged. A difference in
electrical charges between two regions constitutes an electrical gradient.
◼ Because it occurs across the plasma membrane, this charge difference is
termed the membrane potential
Oxygen molecules and sodium ions (Na) are more concentrated in the
extracellular fluid than in the cytosol; the opposite is true of carbon dioxide
molecules and potassium ions (K).
◼ The combined influence of the concentration gradient and the electrical
gradient on movement of a particular ion is referred to as its
electrochemical gradient.
11. What can diffuse through membrane
◼ Protein - free Lipid Bilayers Are Highly
Impermeable to Ions
◼ The smaller the molecule and the more soluble it is
in oil – can pass easily
◼ Small nonpolar molecules, such as O2 (32 daltons)
and CO2 (44 daltons), readily dissolve in lipid
bilayers and therefore rapidly diffuse across them
◼ Uncharged polar molecules also diffuse rapidly
across a bilayer if they are small enough. Water (18
daltons), ethanol (46 daltons), and urea (60 daltons),
glycerol (92 daltons) diffuses less rapidly; glucose
(180 daltons), can not
◼ lipid bilayers are highly impermeable to charged
molecules (ions)
Transportation Across the membrane
12. Types Transportation
carrier proteins channel proteins
carriers, permeases, or transporters
bind the specific solute to be transported
and undergo a series of conformational
changes in order to transfer the bound
solute across the membrane
need not bind the solute
they form hydrophilic pores that
extend across the lipid bilayer
concentration
gradient
Against concentration
gradient
passive Diffusion Active Diffusion
13. Passive Diffusion
◼ Is a passive process in which the random mixing of particles in a solution occurs
because of the particles’ kinetic energy.
◼ They move down their concentration gradient.
14. Several factors influence the diffusion rate
of substances across plasma membranes
◼ Steepness of the concentration gradient : The greater the difference in concentration
between the two sides of the membrane, the higher the rate of diffusion.
❑ charged particles
◼ Temperature: The higher the temperature, the faster the rate of diffusion
❑ diffusion processes occur more rapidly in a person with a fever
◼ Mass of the diffusing substance: The larger the mass - the slower its diffusion rate.
❑ Smaller molecules diffuse more rapidly than larger ones.
◼ Surface area: The larger the membrane surface area -the faster the diffusion rate.
❑ the air sacs of the lungs have a large surface area
◼ Diffusion distance: The greater the distance -the longer it takes.
❑ Diffusion across a plasma membrane takes only a fraction of a second because it
is so thin.
15. Simple Diffusion
◼ is a passive process in which substances move freely through the lipid
bilayer of the plasma membranes of cells without the help of membrane
transport proteins
◼ Nonpolar, hydrophobic molecules including oxygen, carbon dioxide, and
nitrogen gases; fatty acids; steroids; and fat-soluble vitamins (A, D, E, and
K).
◼ Small, uncharged polar molecules such as water, urea, and small alcohols
also pass through the lipid bilayer by simple diffusion.
16. Facilitated Diffusion
◼ Solutes that are too polar or highly charged to move through the lipid bilayer
by simple diffusion can cross the plasma membrane by a passive process
called facilitated diffusion.
◼ CHANNEL-MEDIATED FACILITATED DIFFUSION
Through a membrane channel [ion channels] - integral transmembrane
proteins that allow passage of small, inorganic ions that are too hydrophilic to
penetrate the nonpolar interior of the lipid bilayer.
❑ Eg. For Na, K, Ca ions
◼ CARRIER-MEDIATED FACILITATED DIFFUSION
◼ a carrier (also called a transporter) is used to move a solute down its
concentration gradient across the plasma membrane.
◼ The solute binds to a specific carrier on one side of the membrane and is
released on the other side after the carrier undergoes a change in shape.
❑ E.g Glucose transporter
17. Osmosis
◼ Type of passive diffusion
◼ is a type of diffusion in which there is net movement of a solvent through a
selectively permeable membrane
◼ the solvent is water, which moves by osmosis across plasma membranes
from an area of higher water concentration to an area of lower water
concentration.
◼ During osmosis, water molecules pass through a plasma membrane in two
ways:
◼ (1) by moving through the lipid bilayer via simple diffusion, as previously
described, and
◼ (2) by moving through aquaporins- integral membrane proteins that
function as water channels.
◼ the solution with the impermeable solute also exerts a force, called the
osmotic pressure.
18. Tonicity
◼ Isotonic solution: The concentrations of solutes that cannot
cross the plasma membrane are the same on both sides of the
membrane in this solution.
❑ E.g NaCl: 0.9%
◼ hypotonic solution: a solution that has a lower concentration
of solutes than the cytosol.
◼ hypertonic solution: higher concentration of solutes than
does the cytosol
19. Active Diffusion
◼ Uphill [against concentration gradient]
◼ Some polar or charged solutesTwo
sources of cellular
◼ energy can be used to drive active
transport:
◼ (1) Energy obtained from hydrolysis
of adenosine triphosphate (ATP) is the
source in primary active transport;
◼ (2) energy stored in an ionic
concentration gradient is the source in
secondary active transport..
20. Primary Active Transport
◼ Carrier proteins that mediate primary active transport are often called
pumps.
◼ hydrolysis of ATP changes the shape of a carrier protein
◼ E.g Sodium potassium pump
❑ Three Na + in the cytosol bind to the pump protein
❑ Binding of Na triggers the hydrolysis of ATP into ADP
❑ This chemical reaction changes the shape of the pump protein, expelling
the three Na into the extracellular fluid
❑ Two K + in the extracellular fluid to the pump protein
❑ The binding of K + triggers release of the phosphate group from the
pump protein
❑ As the pump protein reverts to its original shape, it releases K + into the
cytosol.
21. SECONDARY ACTIVE TRANSPORT
◼ Secondary active transport indirectly uses energy obtained from the
hydrolysis of ATP.
◼ The energy stored in a Na+ or H + concentration gradient is used to drive
other substances across the membrane against their own concentration
gradients.
◼ Some of the stored energy can be converted to kinetic energy (energy of
motion) and used to transport other substances against their concentration
gradients.
◼ If these transporters move two substances in the same direction they are
called symporters
❑ Na + /glucose and Na/amino acid symporters
◼ If these transporters move two substances in the opposite direction they are
called antiporters
❑ Na+ /H + and Na+/Ca+ antiporters
22. Transport in Vesicles
◼ small, spherical sac.
◼ Vesicles also import materials from and release materials into
extracellular fluid
◼ Endocytosis: materials move into a cell in a vesicle formed
from the plasma membrane.
❑ Receptor mediated
❑ Phagocytosis
❑ Bulk phase endocytosis
◼ Exocytosis: materials move out of a cell by the fusion with the
plasma membrane of vesicles formed inside the cell.
23. Endocytosis
1. Receptor-mediated endocytosis
◼ highly selective type- cells take up specific ligands.
◼ A vesicle forms after a receptor protein in the plasma membrane recognizes and
binds to a particular particle in the extracellular fluid.
◼ E.g. For cells take up cholesterol containing low-density lipoproteins (LDLs),
transferrin (an iron-transporting protein in the blood), some vitamins, antibodies,
and certain hormones by receptor-mediated endocytosis.
24. Phagocytosis
◼ The cell engulfs large solid particles
◼ E.g worn-out cells, whole bacteria, or viruse
◼ Phagocytes, those cells, that are able to
carry out phagocytosis [Macrophage,
neutrophiles]
◼ Phagocytosis begins when the particle binds
to a plasma membrane receptor on the
phagocyte, causing it to extend pseudopods
◼ Pseudopods surround the particle outside
the cell, and the membranes fuse to form a
vesicle called a phagosome
◼ Phagocytosis is a vital defense mechanism
that helps protect the body from disease
25. bulk-phase endocytosis [Pinocytosis]
◼ tiny droplets of extracellular fluid are taken up.
◼ No receptor proteins are involved; all solutes.
◼ Dissolved in the extracellular fluid are brought into the cell the
plasma membrane folds inward and forms a vesicle containing a
droplet of extracellular fluid.
◼ The vesicle detaches or “pinches off” from the plasma
membrane and enters the cytosol.
26. EXOCYTOSIS
◼ exocytosis releases materials from a cell.
◼ All cells carry out exocytosis, but it is especially important in
two types of cells:
◼ (1) secretory cells that liberate digestive enzymes, hormones,
mucus, or other secretions;
◼ (2) nerve cells that release substances called neurotransmitters
◼ In some cases, wastes are also released by exocytosis.
◼ During exocytosis, membrane-enclosed vesicles called
secretory vesicles
Segments of the plasma membrane lost through endocytosis are
recovered or recycled by exocytosis. The balance between
endocytosis and exocytosis keeps the surface area of a cell’s
plasma membrane relatively constant.
27. TRANSCYTOSIS
◼ Transport in vesicles may also be used to successively move a
substance into, across, and out of a cell. In this active process,
called transcytosis.
◼ vesicles undergo endocytosis on one side of a cell, move
across the cell, and then undergo exocytosis on the opposite
side.
◼ E.g.
◼ Transcytosis occurs most often across the endothelial cells that
line blood vessels and is a means for materials to move
between blood plasma and interstitial fluid. For instance, when
a woman is pregnant, some of her antibodies cross the placenta
into the fetal circulation via transcytosis
28. Cytoplasm
◼ Cytosol(intracellular fluid) + organelles
◼ Cytosol:
❑ 75–90% water
❑ Various dissolved and suspended components: different types of ions,
glucose, amino acids, fatty acids, proteins, lipids, ATP, and waste
products.
◼ Function: The cytosol is the site of many chemical reactions required
for a cell’s existence. For example, enzymes in cytosol catalyze glycolysis.