A beta₁-adrenergic agonist
A)increases heart rate.
B)causes the release of acetylcholine.
C)blocks the effects of norepinephrine at its receptor site.
D)lowers blood pressure.

Question

Quizplus · Accepted Answer

Beta₁-adrenergic agonists stimulate the beta₁-adrenergic receptors, which are found primarily in the heart. Stimulation of these receptors will increase heart rate, which is the main effect of beta₁-adrenergic agonists. Therefore, the correct answer is A. Choices B, C, and D are incorrect because they do not describe the actions of beta₁-adrenergic agonists.

A Beta₁-Adrenergic Agonist