Which of the following is a physiologic effect of epinephrine when used to treat anaphylactic shock?

A) As a vasodilator, it increases the blood pressure.
B) As a vasoconstrictor, it lowers the blood pressure.
C) As a bronchodilator, it improves the patient's breathing.
D) As an antihistamine, it blocks chemicals that cause the reaction.

Answer: C) As a bronchodilator, it improves the patient's breathing.