A Beta₁-Adrenergic Agonist

Question

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.

Accepted Answer

Beta₁-adrenergic agonists stimulate the beta₁-adrenergic receptors, which are primarily located in the heart. Activation of these receptors increases heart rate and contractility, leading to increased cardiac output.