PHYSIOLOGY
CENTRAL NERVOUS SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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An action potential is caused by an influx of these ions into the cell:
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potassium
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sodium
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calcium
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magnesium
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both potassium and sodium
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Explanation:
Detailed explanation-1: -An action potential is generated by the rapid influx of Na+ ions followed by a slightly slower efflux of K+ ions.
Detailed explanation-2: -The action potential has three main stages: depolarization, repolarization, and hyperpolarization. Depolarization is caused when positively charged sodium ions rush into a neuron with the opening of voltage-gated sodium channels.
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