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Which of the following has the highest permeability in a resting nerve cell?(a) Na^+(b) Cl^–(c) I^–(d) K^+I have been asked this question during an internship interview.This intriguing question comes from Cellular Membranes in chapter Cellular Membranes of Cell Biology

Answer»

Correct answer is (d) K^+

The best I can explain: K^+ has the HIGHEST permeability in RESTING nerve cells. Most of the ion channels open in the membrane of a resting nerve cell are selective for potassium, REFERRED to as potassium leak channels.



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