NEET UG BIOLOGY MCQ: BODY FLUIDS AND CIRCULATION

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Assertion: Atria receive the signal for contraction subsequently the blood in them flows to ventricles.

Reason: Action potential generated at the atrio ventricular node passes from atria to ventricles.

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Correct option: C

If, the assertion is true but the reason is false.

Option C (If, the assertion is true but the reason is false) is correct because the atria do contract and push blood into the ventricles, but the action potential originates at the sinoatrial (SA) node, not the atrioventricular (AV) node, and then spreads to the AV node.

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