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