Plasma cells
A. secrete antibodies.
B. function in allergic reactions.
C. suppress immune reactions.
D. activate B cells and other T cells.
E. directly destroy target cells.
Answer: A
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stores embryonic nitrogenous wastes. b. eliminates nitrogenous wastes from the embryo. c. contributes to the formation of the blood vessels in the umbilical cord. d. secretes amniotic fluid. e. serves as a temporary center for formation of blood cells.
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A. Genetic susceptibility B. Toxigenic C. Immune mediated D. Pyogenic
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Many exoenzymes from pathogens are virulence factors.
Answer the following statement true (T) or false (F)