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Heart beat is initiated by...

Heart beat is initiated by

A

Sino-auricular node

B

Atrio-ventricular node

C

Sodium ion

D

Purkinje's fibres

Text Solution

Verified by Experts

The correct Answer is:
A
Heart beat can be initiated by S.A. node (Sino – Auricular node) present in the upper left corner of right atrium. It is called as pacemaker of heart because it generates and conducts nerve impulse about 70 – 75 times faster than A.V. node.
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