Zoology-Heart & Circulation
NEET Zoology Heart & Circulation Assertion Reason Question
Type: Assertion Reason-assertion-Medium-Class 11
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.
A
Both A and R are true, and R is the correct explanation of A.
B
Both A and R are true, but R is not the correct explanation of A.
C
A is true, but R is false.
D
A is false.
Correct Answer
Option A
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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