Download Learning Guide: Origins of Life

Learning Guide: Physiology 3 Transport (Gas Exchange)
Bill Activity #49 B
To Think About: Why do organisms exchange gases with the environment? How is the system regulated? How do the
components of the respiratory system work with other body systems to maintain homeostasis?
1st Learn About: Use text and prezi presentation Transport (gas exchange) to answer the following questions in your
BILL. You will need to go to the gas exchange portion of the presentation to answer these questions.
Ch. 42 Circulation and Gas Exchange: Campbell’s Biology 9th edition
Part III: Animal Transport (Gas Exchange)
Questions to Answer:
1. Why do animals need specialized systems to exchange gasses with the environment?
2. What are the characteristics of a functional respiratory surface?
3. Diagram the countercurrent exchange system of a fish gill, and explain how it maximizes diffusion of respiratory
gasses.
4. Why are capillaries required for gas exchange?
5. Diagram an alveolus to show blood flow, air flow, and oxygenation of both.
6. Compare how oxygen and carbon dioxide are transported in the bloodstream.
7. What happens to hemoglobin in conditions of low pH? Why is this adaptive for mammals?
8. How is breathing controlled by the nervous system in mammals?
Make Sure You Can Explain:
 The consequences of particular evolutionary trends in respiratory systems for the organisms that demonstrate
those trends.
 The structure and function of all parts of the mammalian respiratory system.
 How the components of the respiratory system work with other body systems to maintain homeostasis.
 How the respiratory system is regulated.
 The causes, effects, and treatments of various respiratory system disorders.