Topic 6.5 nerves, hormones & homeostasis assessment statements part 2
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Topic 6.5 nerves, hormones, and homeostasis assessment statements part 2 for IB Biology

Topic 6.5 nerves, hormones, and homeostasis assessment statements part 2 for IB Biology

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Topic 6.5 nerves, hormones & homeostasis assessment statements part 2 Document Transcript

  • 1. I-Shou International School IB Biology 6.5 Nerves, Hormones, & Homeostasis Assessment Statements (Part II) 6.5.7 State that the endocrine system consists of glands that release hormones that are transported in the blood. Define hormone: Define gland: State the function of the endocrine system and briefly outline how it works. 6.5.8 State that homeostasis involves maintaining the internal environment between limits, including blood pH, carbon dioxide concentration, blood glucose concentration, body temperature and water balance. Define homeostasis: Define negative feedback: The human body maintains a constant internal environment. Outline how this is accomplished in regard to the following factors. Factor How it is maintained at a constant level in the human body. Blood pH Carbon Dioxide concentration Blood Glucose concentration Body Temperature Water Balance
  • 2. I-Shou International School IB Biology 6.5.9 Explain that homeostasis involves monitoring levels of variables and correcting changes in levels by negative feedback mechanisms. State how levels of variables are monitored in the body. State how changes to the internal environment of the body are affected if not at the correct level. Draw and label a generalized diagram of a negative feedback system in the body. Explain the process of how homeostasis is maintained in the body by negative feedback mechanisms. 6.5.10 Explain the control of body temperature, including the transfer of heat in blood, and the roles of the hypothalamus, sweat glands, skin arterioles and shivering. State the normal body temperature of the human body. Blood in the transport system is responsible for carrying many things around the body. Describe how it transfers heat in the body. State the location and function of the hypothalamus.
  • 3. I-Shou International School IB Biology Outline the following ways that the body can cool itself if it is too hot. Sweating Vasodilatation Decreased metabolism Behavior modification Hair/feathers Outline the following ways that the body can cool itself if it is too cold. Shivering Vasoconstriction Increased metabolism Behavior modification Hair/feathers 6.5.11 Explain the control of blood glucose concentration, including the roles of glucagon, insulin and α and β cells in the pancreatic islets. Define the term blood sugar. Outline the function of glucagon and insulin, and state their origin cells and target cells. Glucagon Insulin
  • 4. I-Shou International School IB Biology Describe two reasons why blood glucose levels must be regulated. 1) 2) Explain how blood glucose concentration is controlled. Mention glucagon, insulin, heptocytes (liver cells), and glycogen. 6.5.12 Distinguish between type I and type II diabetes. Define hyperglycemia: Define hypoglycemia: Describe diabetes and its effects. Distinguish between type I and type II diabetes. Causes Type I Diabetes Type II Diabetes Treatment