Vagal Stimulation to the Heart Causes

Question

Vagal stimulation to the heart causes
A) a (+) inotropic effect.
B) heart rate to slow.
C) cardiac output to increase.
D) stroke volume to increase.

Accepted Answer

Vagal stimulation to the heart activates the parasympathetic nervous system, which releases acetylcholine that binds to muscarinic receptors in the heart. This binding causes a decrease in heart rate and a negative chronotropic effect. Therefore, the heart rate slows down.