GENERAL ANATOMY
ANATOMY OF THE HEART
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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d, b, a, c, f, g, e
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c, d, a, b, f, g, e
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b, a, d, c, f, g, e
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f, g, d, c, b, a, e
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Detailed explanation-1: -The SA node (physiologicalpacemaker) starts the sequence by generating an electrical impulse, causing the atrial muscles to contract. From there, the signal travels to the AV node, then through the bundle of His, down the bundle branches, and through the Purkinje fibers, causing the ventricles to contract.
Detailed explanation-2: -The SA node starts the sequence by causing the atrial muscles to contract. That’s why doctors sometimes call it the anatomical pacemaker. Next, the signal travels to the AV node, through the bundle of HIS, down the bundle branches, and through the Purkinje fibers, causing the ventricles to contract.
Detailed explanation-3: -The electrical impulse travels from the sinus node to the atrioventricular node (also called AV node). There, impulses are slowed down for a very short period, then continue down the conduction pathway via the bundle of His into the ventricles.
Detailed explanation-4: -so the correct order is SA node, AV node, AV bundle, Purkinje fibres.
Detailed explanation-5: -Name the cardiac conduction cycle events in order: The electrical impulse is initiated at the SA node. The impulse passes to the AV node, which is passed on the the AV bundle. The impulse is transmitted to the Purkinje fibers and the ventricles contract.