Topics: Immunity Quiz
T cells that kill infected cells are
A. cytotoxic T’s
B. helper T’s
C. plasma cells
D. antigen presenting c
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What is thought of as the primary defenses against pathogens in the human body?
A. Lymphocytes and phagocytes
B. Antibodies and lymphocytes
C. The skin and mucous membranes
D. The circulatory system