Biology 107

Study Guide: Defenses against Disease I.

Chapter 43

1. Differentiate between nonspecific and specific defenses. What are the nonspecific lines of defenses?

2. How is the physical barrier of the skin reinforced by chemical defenses?

3. Explain how the function of natural killer cells differs from the function of phagocytes.

4. Describe the inflammatory response, including how it is triggered.

5. List several chemical signals that initiate and mediate the inflammatory response.

6. Explain how the immune response differs from nonspecific defenses.

7. What is the difference between an antigen and an antibody?

8. What is the difference in function between a B cell and a T cell.

9. Distinguish between the primary and secondary response. Why does the secondary immune response arise more quickly?

10. How does the immune system recognize the body’s own cells? What are the consequences when the self/nonself recognition system fails?