alleryStart learning →Where does the wave of ventricular depolarization first arrive after the bundle branches?
AThe apex of the heart
BThe base of the aorta
CThe left atrium
DThe coronary sinus
Answer & Solution
Correct answer: A. The apex of the heart
1. The left and right bundle branches run down the interventricular septum.
2. Both descend and reach the apex of the heart, where they connect with the Purkinje fibers.
3. Contraction therefore begins near the apex and squeezes blood upward.
_Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 19 "The Cardiovascular System: The Heart", section 19.2 Cardiac Muscle and Electrical Activity_
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