ENDOCRINE ORGANS AND RESPIRATORY SYSTEM
ENDOCRINE ORGANS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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potassium ions are flowing into the cell
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potassium ions are flowing out of the cell
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sodium ions are flowing into the cell
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sodium ions are flowing out of the cell
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Detailed explanation-1: -The subsequent return to resting potential, repolarization, is mediated by the opening of potassium ion channels. To reestablish the appropriate balance of ions, an ATP-driven pump (Na/K-ATPase) induces movement of sodium ions out of the cell and potassium ions into the cell.
Detailed explanation-2: -What happens during repolarization? During repolarization, potassium ions move out of the cell via potassium channels. This movement is down the concentration gradient to restore the charges across the cell membrane.
Detailed explanation-3: -Repolarization is caused by the closing of sodium ion channels and the opening of potassium ion channels. Hyperpolarization occurs due to an excess of open potassium channels and potassium efflux from the cell.