Immediate-reaction hypersensitivity occurs when an allergen binds to cell-bound IgE. What is the result of this allergen-antibody interaction?
A) Constriction of nearby blood vessels
B) Further production of IgE antibodies
C) Release of histamine by mast cells
D) Increased mucus production

Question

Quizplus · Accepted Answer

The binding of an allergen to cell-bound IgE primarily triggers mast cells to release histamine, which is a key mediator in allergic reactions, leading to symptoms such as itching, swelling, and redness.

Immediate-Reaction Hypersensitivity Occurs When an Allergen Binds to Cell-Bound IgE