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Question: Answered & Verified by Expert
Impulse of heart beat originates from:
BiologyBody Fluids and CirculationNEETNEET 2002
Options:
  • A SA node
  • B AV node
  • C vagus nerve
  • D cardiac nerve
Solution:
2036 Upvotes Verified Answer
The correct answer is: SA node
An electrical stimulus is generated by the sinoatrial node, or SA node. This is a small mass of specialized tissue located in the right atrium of the heart.
Related Theory:-
The AV node gathers the electrical impulse from $S A$ node and, after a brief delay, allows it to pass through to the ventricles. This brief delay in the transmission of the electrical signal through the AV node is critical to a normal heartbeat and the efficient functioning of the heart.

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