Question

question 1 of 10
a person is walking through a park. a branch from a tree falls, nearly hitting her. her heartbeat speeds up. which part of the nervous system was responsible for this?

a. somatic
b. parasympathetic
c. parasomatic
d. sympathetic

Explanation:

The sympathetic nervous system is part of the autonomic nervous system and is responsible for the "fight - or - flight" response. When a person is in a situation of potential danger (like a branch nearly hitting her), the sympathetic nervous system is activated, which can cause an increase in heart rate. The somatic nervous system is related to voluntary movements. The parasympathetic nervous system is for "rest - and - digest" functions and would decrease heart rate. "Parasomatic" is not a valid part of the nervous system.

Answer:

D. Sympathetic