PHYSIOLOGY
CENTRAL NERVOUS SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The term used when the Na-K ion concentrations across the cell membrane have reversed?
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repolarization
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depolarization
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irritability
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conductivity
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all-or-none response
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Explanation:
Detailed explanation-1: -Thus the opening of sodium channels is depolarizing while the opening of potassium channels is hyperpolarizing.
Detailed explanation-2: -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. As additional sodium rushes in, the membrane potential actually reverses its polarity.
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