Cytotoxic T cells:

A. secrete perforin, which kills bacteria and viruses by perforating the membrane or coat that surrounds them.
B. are activated by interleukin 1.
C. require Class I MHC proteins to recognize foreign antigens.
D. are converted to plasma cells when activated by MHC proteins.
E. secrete proteins that neutralize bacterial toxins.


C

Anatomy & Physiology

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