Beta-blockers (beta-adrenergic blocking agents) are frequently used to
A) cause vasoconstriction.
B) block muscarinic receptors.
C) dilate the pupils of the eye.
D) prevent increases in heart rate.
E) prevent decreases in heart rate.

Question

Quizplus · Accepted Answer

Beta-blockers are primarily used to prevent increases in heart rate by blocking the action of epinephrine and norepinephrine on beta-adrenergic receptors in the heart.

Beta-Blockers (Beta-Adrenergic Blocking Agents) Are Frequently Used to