When Mast Cells Degranulate and Release Histamine, Which of the Following

Question

When mast cells degranulate and release histamine, which of the following events may occur?
A) constriction of small blood vessels
B) bronchial spasms
C) increased mucus production
D) both constriction of small blood vessels and bronchial spasms
E) both bronchial spasms and increased mucus production

Accepted Answer

When mast cells degranulate and release histamine, it can lead to bronchial spasms and increased mucus production. Histamine typically causes dilation of small blood vessels, not constriction, which is why the other options are not correct.