MEDICAL
NERVES
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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: -Answer and Explanation: An action potential is caused by an influx of sodium ions into the cell. An action potential will occur when sodium channels open, allowing sodium ions into the cell causing the membrane potential to reach its threshold of-55 mV.
Detailed explanation-2: -The action potential is a clear example of how changes in membrane potential can act as a signal. The depolarization, also called the rising phase, is caused when positively charged sodium ions (Na+) suddenly rush through open voltage-gated sodium channels into a neuron.
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