Question

what is the correct order of spread of the action potential through the hearts conduction system? multiple choice av node, sa node, av bundle, subendocardial branches/cell gap junctions subendocardial branches/cell gap junctions, sa node, av node, av bundle sa node, av node, subendocardial branches/cell gap junctions, av bundle

Explanation:

The sino - atrial (SA) node is the natural pacemaker of the heart and initiates the action potential. It then travels to the atrioventricular (AV) node. From the AV node, the impulse passes through the AV bundle (bundle of His) and then to the subendocardial branches/cell gap junctions which spread the impulse throughout the ventricles.

Answer:

SA node, AV node, AV bundle, subendocardial branches/cell gap junctions (none of the provided options are correct as presented, but the correct order is as stated here)