The Purpose of the AV Node Is to _______, and the Purpose

Multiple Choice

The purpose of the AV node is to _______, and the purpose of the Purkinje fibers is to _______.

A) create simultaneous atrial and ventricular depolarization; speed up transmission of the cardiac impulse into the ventricle
B) delay ventricular depolarization relative to atrial depolarization; insulate the cardiac impulse from the general ventricular fibers
C) delay ventricular depolarization relative to atrial depolarization; ensure the cardiac impulse spreads rapidly and evenly throughout the ventricles
D) delay atrial depolarization relative to ventricular depolarization; transmit the cardiac impulse to very small, localized groups of ventricular fibers
E) initiate each heartbeat; transmit impulses to the atria