How do parasympathetic neural signals affect the working of the heart?

How do parasympathetic neural signals affect the working of the heart?
  1. Reduce both heart rate and cardiac output
  2. Heart rate is increased without affecting the cardiac output.
  3. Both heart rate and cardiac output increase
  4. Heart rate decreases but cardiac output increases.

Solution

Parasympathetic signals reduce both heart rate and cardiac output through the cholinergic, post-ganglionic fibers. The parasympathetic system releases the hormone acetylcholine to slow the heart rate.

Asked in: NEET 2014

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