Question

which of the following is true concerning the hearts conduction system?
multiple choice
action potentials pass slowly through the atrioventricular node.
action potentials pass slowly through the atrioventricular bundle.
action potentials pass slowly through the subendocardial branches (purkinje fibers).
action potentials pass slowly through the ventricle wall.
action potentials pass slowly through the bundle branches.

Explanation:

The atrioventricular (AV) node has a slower conduction velocity compared to other parts of the heart's conduction system. This delay allows the atria to fully contract and fill the ventricles before the ventricles start contracting. The atrioventricular bundle, subendocardial branches (Purkinje fibers), ventricle wall, and bundle branches have relatively faster conduction velocities.

Answer:

Action potentials pass slowly through the atrioventricular node.