Question

When the parasympathetic nervous system is stimulated:

• A. Heart beat stops
• B. Heart beat decreases
• C. Heart beat increases
• D. Heart beat is not affected

Answer 1

The correct option is B

Heart beat decreases

The parasympathetic nervous system is a part of the involuntary nervous system, that serves to slow the heart rate, increase intestinal and glandular activity and relax the sphincter muscles. The parasympathetic nervous system, together with the sympathetic nervous system, constitutes the autonomic nervous system and the two systems have opposing functions.