Cardiac action potentials usually originate in ______________ cells.
A)Purkinje
B)chordae tendinae
C)pacemaker
D)septal

Question

Quizplus · Accepted Answer

Cardiac action potentials originate in pacemaker cells, also known as sinoatrial (SA) nodes. These specialized cells have the ability to spontaneously depolarize and generate an action potential, which then spreads throughout the heart and initiates its contraction. Purkinje, chordae tendinae, and septal cells do not have this pacemaker ability.

Cardiac Action Potentials Usually Originate in ______________ Cells