6. What type of B cell remains dormant in the body, but can respond rapidly if the same antigen appears again?
A. T cells
B. Memory cells
C. Plasma cells
D. Macrophages
7. The maturation of T cells and the production of particular T cell receptors occurs in the
A. thyroid gland
B. thymus gland
C. testes
D. all of these
8. Which of the following provide specific defense against viruses and bacteria?
A. T cells
B. B cells
C. Complement
D. inflammation
9. Which of these is a type of specific defense against pathogens?
A. Lymphocytes
B. Macrophages
C. Phagocytes
D. Leukocytes
10. In animals, blood clots serve the function of
A. consuming invading organisms
B. helping them match the background coloration of the habitat
C. stimulating production of killer T lymphocytes
D. repairing damage to the body wall
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