PHYSIOLOGY
CENTRAL NERVOUS SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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When a nerve fiber polarized, the concentration of:
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Sodium and potassium ions is higher on the inside of the membrane
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Sodium ions is higher on the inside of its membrane and potassium is higher on the outside
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Sodium and potassium ions is higher on the outside of the membrane
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None of the above
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Explanation:
Detailed explanation-1: -The sodium and chloride ion concentrations are lower inside the cell than outside, and the potassium concentration is greater inside the cell. These concentration differences for sodium and potassium are due to the action of a membrane active transport system which pumps sodium out of the cell and potassium into it.
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