NEETZoology-Body Fluids and Circulation
NEET Zoology Heart Function MCQ Question
Type: MCQ-conceptual-Medium-Class 11
Role of pacemaker is:
A
To initiate and maintain the rhythmic contractile activity of the heart
B
To initiate and maintain the arhythmic contractile activity of the heart
C
To initiate and maintain the rhythmic contractile activity of blood vessels
D
To generate minimum action potentials for initiating and maintaining the rhythmic contractile activity of the heart.
Correct Answer
Option A
Detailed Explanation
The pacemaker, or sinoatrial node, initiates and maintains the heart's rhythmic contractions.
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