Dramatic hypotension sometimes accompanies type I hypersensitivity reactions,because
A) massive histamine release from mast cells leads to vasodilation.
B) toxins released into the blood interfere with cardiac function.
C) anaphylaxis results in large volume losses secondary to sweating.
D) hypoxia resulting from bronchoconstriction impairs cardiac function.

Question

Quizplus · Accepted Answer

Hypotension can occur in type I hypersensitivity resulting from massive histamine release leading to vasodilation.Toxins are not released during type I hypersensitivity reactions.Sweating occurs as a reaction to shock from severe hypotension; the hypotension occurs first and is because of histamine release.Hypoxia occurs in anaphylaxis as a result of shock from severe hypotension; the hypotension occurs first and is because of histamine release.

Dramatic Hypotension Sometimes Accompanies Type I Hypersensitivity Reactions,because