Not all phagocytic cells are antigen-presenting cells. B cells, macrophages, and dendritic cells differ from neutrophils in that they synthesize ______ .
A. interleukin-2
B. CD8 receptors
C. MHC-II receptors
D. MHC-I receptors
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Superantigens are
A. body tissues that the immune system mistakes as foreign.
B. bacterial toxins that activate T cells at a 100 times greater rate than other antigens.
C. cell markers found in some member of a species but not in other members.
D. antigens that evoke allergic reactions.
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