Question

question 12 of 30
while you are waiting to begin a foot race, you can feel your heart rate go up.
this is the ______ at work.

a. parasympathetic nervous system
b. endocrine system
c. central nervous system
d. sympathetic nervous system

Explanation:

When preparing for a race (a stressful/stimulating situation), the sympathetic nervous system activates the "fight - or - flight" response, which increases heart rate. The parasympathetic system (A) has a calming effect (decreases heart rate). The endocrine system (B) is broader and not specific to this immediate response. The central nervous system (C) consists of the brain and spinal cord and isn't the direct system for this peripheral response.

Answer:

D. sympathetic nervous system