When a neuron is depolarized, the inside of the membrane temporarily becomes amore negative than the outside bmore positive than the outside cneutral compared to the outside dNone of the above
Question
When a neuron is depolarized, the inside of the membrane temporarily becomes amore negative than the outside bmore positive than the outside cneutral compared to the outside dNone of the above
Solution
When a neuron is depolarized, the inside of the membrane temporarily becomes more positive than the outside. So, the correct answer is b) more positive than the outside.
Here's a step-by-step explanation:
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In a resting state, the inside of a neuron is more negative than the outside. This is due to a higher concentration of negatively charged proteins and nucleic acids inside the cell, and the action of the sodium-potassium pump which maintains a higher concentration of K+ ions inside and Na+ ions outside the cell.
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When a neuron is stimulated, voltage-gated Na+ channels open, allowing Na+ ions to rush into the cell. This influx of positive ions makes the inside of the cell more positive than the outside. This is known as depolarization.
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The depolarization of the neuron is what allows an action potential to occur, which is the basis for neural communication.
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After the action potential, the neuron repolarizes to restore the negative inside, positive outside balance. This is done by the opening of voltage-gated K+ channels and the closing of Na+ channels. K+ ions rush out of the cell, restoring the negative charge inside the cell.
Similar Questions
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Depolarization of a cell membrane occurs because
During an action potential of a neuron, the type of ion that enters the cell and causes depolarization is the ion.
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