Which of the following adrenergic neurotransmitter receptors plays the major role in heart activity?
A) alpha 1
B) beta 1
C) beta 2
D) beta 3

Question

Quizplus · Accepted Answer

Beta 1 adrenergic receptors play a major role in heart activity by increasing heart rate and contractility. This is important for maintaining cardiac output and blood pressure. Alpha 1 adrenergic receptors are primarily involved in vasoconstriction, beta 2 adrenergic receptors are mainly found in bronchial smooth muscle and promote bronchodilation, and beta 3 adrenergic receptors are involved in lipolysis and thermogenesis.

Which of the Following Adrenergic Neurotransmitter Receptors Plays the Major