Multiple choice

Stimulation of the vagus nerve will make the heart beat

  1. faster

  2. 40 times/min

  3. slower

  4. normal

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The vagus nerve (cranial nerve X) is the primary component of the parasympathetic nervous system's influence on the heart. When stimulated, it releases acetylcholine at the SA node, which decreases the rate of depolarization and slows the heart rate. This is part of the 'rest and digest' parasympathetic response.

Keep practicing — related questions