Which of the following would be most likely to increase heart rate?
A) Activation of preganglionic sympathetic neurons
B) Diminished activation of postganglionic sympathetic neurons
C) Activation of preganglionic parasympathetic neurons
D) Activation of postganglionic parasympathetic neurons

Question

Quizplus · Accepted Answer

Activation of preganglionic sympathetic neurons leads to the release of norepinephrine and epinephrine, which binds to β1-adrenergic receptors in the heart, increasing heart rate.

Which of the Following Would Be Most Likely to Increase