GENERAL ANATOMY
ANATOMY OF THE HEART
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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atria to contract
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ventricles to contract toward apex
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ventricles to contract superiorly that begins at apex and moves toward atrium
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delay in depolarization
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Detailed explanation-1: -When the Purkinje fibers deliver electrical signals to your ventricles, the ventricles contract. As they contract, blood flows from your right ventricle to your pulmonary arteries and from your left ventricle to your aorta.
Detailed explanation-2: -Answer and Explanation: The contraction of the ventricles is more efficient when starting at the apex of the heart because the vessels that carry the blood away from the heart are located in the base of the heart.
Detailed explanation-3: -Purkinje fibers play a major role in electrical conduction and propagation of impulse to the ventricular muscle. Many ventricular arrhythmias are initiated in the Purkinje fiber conduction system (eg.
Detailed explanation-4: -The Purkinje fibers are large‐diameter fibers that conduct the action potential from the interventricular septum, down to the apex, and then upward through the ventricles.