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

2. The thymus is where T-cell lymphocytes:

3. One purpose of lymph nodes is to:

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

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

6. Lymphoid organs include the

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

8. Phagocytosis takes place in:

9. Cytokines are chemical messengers which:

10. B-cell lymphocytes mature in the: