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NEET Previous Year Question

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

Topic: NEET PYQ

Answer: A. Full step-by-step solution below.

A $Reduce both heart rate and cardiac output.$
B $Heart rate is increased without affecting the cardiac output.$
C $Both heart rate and cardiac output increase.$
D $Heart rate decreases but cardiac output increases.$

Correct answer: A

Solution

(a) Parasympathetic stimulation (via the vagus nerve and acetylcholine) decreases heart rate (bradycardia) and reduces cardiac output.

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