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Respected teacher,During repolarization potassium ions move outside the axonal membrane . Shouldn`t it be the sodium ions moving out as their concentration is more outside the membrane to regain the resting potentialThank you in advance for the answer

Respected teacher,During repolarization potassium ions move outside the axonal membrane . Shouldn`t it be the sodium ions moving out as their concentration is more outside the membrane to regain the resting potentialThank you in advance for the answer

Grade:11

1 Answers

Dr.Adam Shaik
askIITians Faculty 387 Points
7 years ago
Hai, Navdeep Dhingra,Interesting question.
1.The Na+ channels are closed during repolarization stage,
(Thus K+ causes balance in charge) where as K+ channels facilitate the movement of Na+ ions outside the membrane
This occurs becasue the Potassium ion channels allow both Na+ and K+.
Later the number of potassium ions decreases outside the membrane.
Go through the below image for further clarification.
The yellow doors represent Na+ ion channels
and blue are for K+ ion channels
519-1345_7-neurons-20-638.jpg

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