Zoology-Heart & Circulation
NEET Zoology Heart & Circulation MCQ Question
Type: MCQ-fact-Medium-Class 11
Which structure in the heart is responsible for initiating the heartbeat?
A
Sino-atrial node
B
Atrioventricular node
C
Left ventricle
D
Right atrium
Correct Answer
Option A
Detailed Explanation
The sino-atrial node (SAN) is a patch of nodal tissue located in the right upper corner of the right atrium, and it is responsible for initiating the heartbeat as it is autoexcitable.
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