The nursing instructor is discussing the development of human immunodeficiency disease (HIV) with the students. What should the instructor inform the class about helper T cells?
a) They are activated on recognition of antigens and stimulate the rest of the immune system.
b) They have the ability to decrease B-cell production.
c) They are responsible for recognizing antigens from previous exposure and mounting an immune response.
d) They attack the antigen directly by altering the cell membrane and causing cell lysis.
Answer: A
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