Helper T cells:
A. are activated by antigen presented with MHC II proteins.
B. secrete antibodies that target specific antigens.
C. secrete perforin when activated.
D. convert to plasma cells after they are activated.
E. do not interact with MHC proteins.
A
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The temperature yesterday was an uncomfortable 98° F. You unwisely chose to play tennis at noon, counting on your body's internal defenses to protect you against heat exhaustion. How did your body respond to this distress?
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