Type I hypersensitivity is caused by the release of vasoactive products from mast cells coated with
A) IgM.
B) IgA.
C) IgE.
D) IgG.

Question

Quizplus · Accepted Answer

Type I hypersensitivity is also known as immediate hypersensitivity and is mediated by IgE antibodies that are bound to mast cells. Upon subsequent exposure to the offending allergen, the allergen binds to the IgE antibodies, leading to cross-linking and activation of the mast cells. This results in the release of vasoactive products such as histamine, leukotrienes, and prostaglandins, which cause the characteristic symptoms of Type I hypersensitivity reactions. Therefore, the correct choice is C (IgE).

Type I Hypersensitivity Is Caused by the Release of Vasoactive