1. A role of immunoglobulin G (IgG) is to:

2. One purpose of lymph nodes is to:

3. The thymus is where T-cell lymphocytes:

4. Phagocytosis takes place in:

5. Lymphoid organs include the

6. Cytokines are chemical messengers which:

7. The majority of lymph fluid in the body returns to the venous circulation via the

8. Which of the following are characteristics of free macrophages and microphages?

9. Which of the following is an example of naturally acquired active immunity?

10. B-cell lymphocytes mature in the: