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NEET 2014
Exam
NEET
Year
2014
Subject
Zoology
Chapter
Body Fluids and Circulation

NEET 2014 · Zoology · Body Fluids and Circulation

How do parasympathetic neural signals affect the working of the...

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

Options

  1. AReduce both heart rate and cardiac output
  2. BHeart rate is increased without affecting the cardiac output.
  3. CBoth heart rate and cardiac output increase
  4. DHeart rate decreases but cardiac output increases.

Correct answer

A. Reduce both heart rate and cardiac output

Step-by-step 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.
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