1. B-cell lymphocytes mature in the:

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

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

4. Cytokines are chemical messengers which:

5. One purpose of lymph nodes is to:

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

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

8. Lymphoid organs include the

9. Phagocytosis takes place in:

10. The thymus is where T-cell lymphocytes: