If you experimentally increase the concentration of K+ inside a cell while maintaining other ion concentrations as they were, what would happen to the cell's membrane potential?
A) The membrane potential would become more negative.
B) The membrane potential would become less negative.
C) The membrane potential would remain the same.
D) The membrane potential would first become more negative and then less negative.

Question

Quizplus · Accepted Answer

Increasing the concentration of K+ inside the cell would increase the gradient for K+ to leave the cell, making the inside of the cell more negative as K+ ions move out, thus making the membrane potential more negative.

If You Experimentally Increase the Concentration of K+ Inside a Cell