Question

After a wave of depolarization exits the AV node, what is the sequence of the locations that it passes through?

Answer 1

The sequence after depolarization exits the AV node follows through the atrioventricular bundle, left and right bundle branches, and finally to the Purkinje fibers, culminating in ventricular contraction.

Step-by-step explanation:

After a wave of depolarization exits the atrioventricular (AV) node, the sequence of locations that it passes through is as follows:

1. The impulse travels to the atrioventricular bundle (also known as the bundle of His).
2. It then continues down to the left and right bundle branches which extend through the interventricular septum.
3. Finally, the Purkinje fibers conduct the impulse from the apex of the heart up the ventricular myocardium, causing the ventricles to contract.

This sequence allows the atria to complete pumping blood into the ventricles before the impulse causes the ventricles to contract.