Physiology Test Question

These cells are known as the primary pacemakers of the heart:

	(A) Cells of the sinoatrial (SA) node
	(B) Cells of the atrioventricular (AV) node
	(C) Fibers of the bundle of His
	(D) Fibers of the left and right bundle branches
	(E) Purkinje fibers

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Posted: Saturday, August 9, 2014

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