NEET Zoology Heart & Circulation Assertion Reason Question
Assertion (A): The sino-atrial node acts as the pacemaker of the heart.
Reason (R): The sino-atrial node generates electrical impulses that trigger the contraction of cardiac muscles.
Both A and R are true, and R is the correct explanation of A.
Both A and R are true, but R is not the correct explanation of A.
A is true, but R is false.
A is false.
Correct Answer
Detailed Explanation
The sino-atrial node is responsible for initiating the electrical impulses that cause the heart to contract, thus acting as the pacemaker.
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