Multiple choice

If the vagus branch of frog is stimulated, the heart beat will

  1. be stopped

  2. be decreased

  3. be increased

  4. show no change
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The vagus nerve is part of the parasympathetic nervous system, which releases acetylcholine to slow heart rate. This is why vagal stimulation decreases heartbeat, known as vagal bradycardia.

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