Activation of which kind of receptor causes heart rate to increase?
A)alpha-one receptor
B)beta-one receptor
C)muscarinic receptor
D)beta-two receptor
E)preganglionic

Question

Quizplus · Accepted Answer

Activation of beta-one receptors in the heart causes an increase in heart rate. Alpha-one receptors, muscarinic receptors, and preganglionic receptors do not have this effect. Beta-two receptors primarily cause bronchodilation and vasodilation.

Activation of Which Kind of Receptor Causes Heart Rate to Increase