1.

Assertion : Sino-atrial node (SAN) is called the pacemaker Reason : SAN generates the maximum number of action potentials and is responsible for intiating and maintaining the rhythmic contractions of the heart.A. Right upper corner of tight atriumB. Left upper corner of right atriumC. Right lower corner of left atriumD. Left lower corner of left atrium

Answer» Correct Answer - A
Sino-atrial node (SAN) ia a patch of nodal tissue is present in right upper corner of right atrium.


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