What is the effect of the parasympathetic fibers carried by the vagus nerve?
A) They speed up the heartbeat.
B) They increase the force of cardiac contractions.
C) They slow the heartbeat.
D) The heartbeat is not influenced by the vagus nerve.

Question

Quizplus · Accepted Answer

Parasympathetic fibers carried by the vagus nerve slow down the heartbeat. This is due to the fact that the parasympathetic nervous system is responsible for the "rest and digest" response, which slows down bodily functions to promote relaxation and conservation of energy. In the case of the heart, parasympathetic stimulation leads to a decrease in heart rate and force of contractions.

What Is the Effect of the Parasympathetic Fibers Carried by the Vagus