1. Interferon is a lymphokine that exerts its effect by:

2. Effector T cells destroy foreign organisms by:

3. An example of biologic response modifiers that interfere with viruses is:

4. The body’s first line of defense is the:

5. During the proliferation stage:

6. Antibodies are believed to be a type of:

7. Complement acts by:

8. It is important to realize that cellular membrane damage results from all the following except:

9. Lymphocytes interfere with disease by picking up specific antigens from organisms to alter their function during which stage of an immune response?

10. The primary production site of white blood cells involved in immunity is the:

11. Helper T cells accomplish all of the following except:

12. Cell-mediated immune responses are responsible for all of the following except:

13. The primary cells responsible for recognition of foreign antigens are:

14. Granulocytes, which fight invasion by releasing histamine, do not include:

15. The leukocytes that arrive first at a site where inflammation occurs are:

16. White blood cells that function as phagocytes are called:

17. The immune system is essentially composed of:

18. A deficient immune system response that is congenital in origin would be classified as what kind of disorder?

19. Trace elements, essential for optimum immune function, include all of the following except:

20. T lymphocytes, descendants of stem cells, mature in the: