During an IgE-mediated hypersensitivity reaction, what causes bronchospasm? A)Bronchial edema caused by chemotactic factor of anaphylaxis B)Bronchial edema caused by binding of the cytotropic antibody C)Smooth muscle contraction caused by histamine bound to H₁ receptors D)Smooth muscle contraction caused by histamine bound to H₂ receptors

Question

Quizplus · Accepted Answer

Acting through the H₁ receptors, histamine contracts bronchial smooth muscles, causing bronchial constriction; increases vascular permeability, causing edema; and causes vasodilation, increasing blood flow into the affected area .

During an IgE-Mediated Hypersensitivity Reaction, What Causes Bronchospasm