In order to activate the cell mediated immune response, which event must occur?
a. A naïve helper T cell must bind to an antigen-presenting dendritic cell.
b. A naïve B cell must be activated in order to activate the effector helper T cell.
c. A free bacterium must pass through a lymph node where it will directly activate the effector helper T cell.
d. A damaged or infected body cell must pass through a lymph node in order to activate T cells.
e. Antibodies must bind to naïve helper T cells.
ANSWER: a
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