Which of the Following Most Accurately Describes the Vagus Nerve

Question

Which of the following most accurately describes the vagus nerve?
A) Fight or flight
B) Norepinephrine
C) Parasympathetic
D) Causes tachycardia

Accepted Answer

The vagus nerve is part of the parasympathetic nervous system, which is responsible for rest and digest functions. It has the opposite effect of the sympathetic nervous system, which is responsible for fight or flight responses. The vagus nerve also regulates the heart rate and can cause bradycardia, the opposite of tachycardia. Norepinephrine is a neurotransmitter involved in the sympathetic nervous system response, but it is not specific to the vagus nerve.