The release of ____ into the blood would increase the heart rate.

The release of ____ into the blood would increase the heart rate.
A . rennin
B . ANP
C . norepinephrine
D . insulin

View Answer

Answer: C

Explanation:

Norepinephrine (as well as epinephrine), released by the adrenal glands, stimulates the sympathetic nervous system. A consequence of norepinephrine and epinephrine on the heart is an increase in the heart rate. The sympathetic nervous system is linked to the fight-or-flight response.