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Rate of heartbeat is determined by...

Rate of heartbeat is determined by

A

Purkinje fibres

B

papillary muscles

C

AV-node

D

SA-node

Text Solution

Verified by Experts

The correct Answer is:
D
The cardiac impulse originates from SA node. This impulse is of highest rhythmicity. By determining the rate of discharge of the cardiac impulse the SA node determines the rate of heartbeat.
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