Heart beats are accelerated by

Options

A. Cranial nerves and acetylcholine
B. Sympathetic nerves and acetylcholine
C. Cranial nerves and adrenaline
D. Sympathetic nerves and epinephrine

Answer

D

Explanation

The hormone adrenaline also called epinephrine is known as stress hormone. In emotional upset (like fear, anger etc.) this hormone is poured into the blood and it accelerates the heart beat. The hormone acetylcholine decrease heart beat rate.