ANATOMY
CHEST AND CARDIOVASCULAR
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What does the AV Node do?
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Causes Ventricles to contract
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Cause right Atria to contract
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Delays passage of impulses to the ventricles
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Directs impulses to the apex of the heart
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Explanation:
Detailed explanation-1: -This node is between the atria and the ventricles. In the AV node, the impulses are slowed down for a very short time. This allows the atria to contract a fraction of a second before the ventricles. The blood from the atria empties into the ventricles before the ventricles contract.
Detailed explanation-2: -After an electrical impulse is generated by the sinus node (located at the top of the right atrium), it spreads across both atria, causing these chambers to beat. The AV node then “gathers” that electrical impulse and, after a brief delay, allows it to pass through to the ventricles.
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