What is the most important negative inotropic agent?
A)Norepinephrine
B)Epinephrine
C)Acetylcholine
D)Dopamine

Question

Quizplus · Accepted Answer

Chemicals affecting contractility are called inotropic agents. The most important negative inotropic agent is acetylcholine released from the vagus nerve. The most important positive inotropic agents produced by the body are norepinephrine released from the sympathetic nerves that supply the heart and epinephrine released by the adrenal cortex. Other positive inotropes include thyroid hormone and dopamine.

What Is the Most Important Negative Inotropic Agent