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Ch 32 Homeostasis and Endocrine Signaling reading guide – Biology in Focus
1. What is the difference between anatomy and physiology?
Concept 32.1 Feedback control maintains the internal environment in many animals.
2. Explain the difference between a tissue, organ and organ system.
3. Give an example of how structure and function are closely related in the human body.
4. Complete the chart on Tissues
Name of Tissue
Where found in body
Other info
5. Explain the difference between a regulator and a conformer.
6. Define “homeostasis”.
7. What does negative feedback mean? Use the example of thermoregulation to explain what
happens in this case.
8. Describe the four ways that heat can be exchanged with the environment.
9. Explain countercurrent exchange and give an example.
Concept 32.2 Endocrine signals trigger homeostatic mechanisms in target tissues
10. What are the two systems in the body that coordinate and control our bodies?
11. Explain a simple endocrine pathway using an example
12. Explain a neuroendocrine pathway using an example.
13. Label and explain the diagram below.
14. Explain how positive feedback works using an example.
15. Where are the receptors for hormones that are lipid soluble found? Give an example of two
hormones that are lipid soluble.
16. Hormones can have more than one response. Give an example of how epinephrine can elicit
more than one response?
17. What allows one hormone have more than one response?
18. Give an example of how a hormone function has diverged between species.
Concept 32.3 A shared system mediates osmoregulation and excretion in many animals.
19. Define the following terms:
a. osmoregulation
b. excretion
20. Explain how these different fish osmoregulate based on their surroundings.
Marine fish
Freshwater fish
21. Where do nitrogenous wastes come from?
22. What are the three types of nitrogenous wastes and what types of animals give off that waste?
23. What advantage does uric acid offer a nitrogenous waste in arid environments?
24. Explain the four key steps in the excretory system using the diagram below.
25. How doe invertebrates get rid of wastes? Give two examples.
26. Label the nephron.
27. Label the diagram and briefly explain what happens with the filtrate from the glomerulus to
the end of the collecting duct.
28. Explain how Antidiuretic hormone works using the diagram below.
29. Explain how blood volume is regulated using the diagram below.
30. Many medications make the epithelium of the collecting duct less permeable to water. How
would taking such a drug affect kidney output? Explain.