MEDICAL
HEART AND PERICARDIUM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The velocity of Action Potentials can change depending on where it is in the conduction system. Which part to the conduction system is at 1m/s?
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Atria/ventricle contractile fibers
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SA/AV Node
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Purkinje Fibers
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None of the above
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Explanation:
Detailed explanation-1: -The cardiac action potential is a brief change in voltage (membrane potential) across the cell membrane of heart cells. This is caused by the movement of charged atoms (called ions) between the inside and outside of the cell, through proteins called ion channels.
Detailed explanation-2: -[Conduction system of the heart]The physiological pacemaker of the heart is the sinuatrial node placed in the right atrium near the superior vena cava. The sinuatrial and atrioventricular nodes are connected through the internodal conduction pathways providing fast action potentials transmission.
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