Hay Fever That Occurs When People Are Exposed to Pollen

Multiple Choice

Hay fever that occurs when people are exposed to pollen involves an excess release of IgE, which binds to _ and causes them to .

A) mast cells : stimulate the proliferation of cytotoxic T cells
B) mast cells : degranulate, releasing histamine
C) pollen : stimulate the release of histamine
D) T helper cells : stimulate the proliferation of cytotoxic T cells
E) macrophages : destroy the pollen whose by- products stimulate histamine release