PATHOLOGY MCQ
NERVOUS SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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When NA+ channel open and Na+ are flowing inside the cell and make the condition of the cell is more positive than outside
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repolarization
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Depolarization
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -Hyperpolarization and depolarization Hyperpolarization is when the membrane potential becomes more negative at a particular spot on the neuron’s membrane, while depolarization is when the membrane potential becomes less negative (more positive).
Detailed explanation-2: -Once the sodium channels open, the neuron completely depolarizes to a membrane potential of about +40 mV. Action potentials are considered an “all-or nothing” event, in that, once the threshold potential is reached, the neuron always completely depolarizes.
There is 1 question to complete.