The major determinant of the resting potential of all cells is A) Ca²⁺ concentration in the blood and interstitial fluid. B) Na⁺ concentration in the blood and interstitial fluid. C) K⁺ gradient between the blood and interstitial fluid. D) K⁺ concentration inside cells. E) Na⁺ concentration inside cells.

Question

Quizplus · Accepted Answer

The resting potential is primarily determined by the K⁺ gradient across the cell membrane, as K⁺ ions move out of the cell, creating a negative charge inside.

The Major Determinant of the Resting Potential of All Cells