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 (parasympathetic) releases acetylcholine that slows heart rate by decreasing SA node activity. This is opposite to sympathetic stimulation which increases heart rate. Vagal stimulation can reduce heart rate to 40-60 beats/minute.