18. The Heart
Electrical Conduction System of the Heart
Multiple Choice
Multiple ChoiceThe intrinsic conduction system ensures a coordinated and efficient heartbeat. If the sinoatrial (SA) node malfunctions, which part of the heart’s conduction system is most likely to take over as the pacemaker?
A
Atrioventricular (AV) node.
B
Bundle of His.
C
Purkinje Fibers.
D
Atrial muscle cells.
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