MEDICAL
HEART AND PERICARDIUM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Right bundle branch
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AV node
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Bundle of his
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SA node
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Detailed explanation-1: -It delays the signal by a consistent amount of time (a fraction of a second) each time. The delay ensures that your atria are empty of blood before the contraction stops. The atria are the heart’s upper chambers. They receive blood from your body and empty it into the ventricles.
Detailed explanation-2: -The AV node is a highly specialized conducting tissue (cardiac, not neural) that slows the impulse conduction considerably (to about 0.05 m/sec), which allows for sufficient time to complete atrial depolarization and contraction prior to ventricular depolarization and contraction.
Detailed explanation-3: -AV Node Delay. CLASS, a SMALLER nodal cell DIAMETER leads to a slighly slower conduction of the electrical signal. How is this delay beneficial to the heart? It gives the atria just a little more time to eject as much blood as possible into the ventricles.