Why does a sensitized person not experience a skin reaction immediately after exposure to poison oak?
A) The reaction is caused by activation of memory B cells formed as a result of the first exposure. Active B cells are not formed immediately.
B) The reaction is caused by activation of plasma cells formed as a result of the first exposure. Active B cells are not formed immediately.
C) The reaction is caused by activation of memory T cells formed as a result of the first exposure. Active T cells are not formed immediately.
D) The reaction is caused by activation of macrophages formed as a result of the first exposure. Activated macrophages are not formed immediately.
E) The reaction is caused by activation of dendritic cells formed as a result of the first exposure. Activated dendritic cells are not formed immediately.

Question

Quizplus · Accepted Answer

Sensitization to poison oak involves the activation and maturation of memory T cells specific for the antigen. Upon re-exposure, the memory T cells can rapidly recognize and activate an immune response, leading to the skin reaction. Active T cells are not formed immediately upon exposure, which is why there is a delay in the appearance of the skin reaction.

Why Does a Sensitized Person Not Experience a Skin Reaction