The Heart Rate is Increased by _______ Stimulation

Question

The heart rate is increased by _______ stimulation.
A) somatic
B) vagal
C) parasympathetic
D) sympathetic

Accepted Answer

Sympathetic stimulation causes an increase in heart rate through the release of the hormone adrenaline from the adrenal glands, which leads to increased contraction of the heart muscles. Somatic, vagal and parasympathetic stimulation do not have a direct effect on heart rate increase.