Raising the potassium ion concentration in the extracellular fluid surrounding a nerve cell will have which effect?
A)depolarize the membrane potential
B)hyperpolarize the membrane potential
C)increase the magnitude of the potassium equilibrium potential
D)repolarize the membrane potential
E)increase the magnitude of the sodium equilibrium potential

Question

Quizplus · Accepted Answer

Increasing the potassium ion concentration in the extracellular fluid will depolarize the membrane potential. This is because a higher external potassium concentration reduces the potassium gradient across the membrane, making it less negative inside compared to when potassium concentration is lower outside the cell.

Raising the Potassium Ion Concentration in the Extracellular Fluid Surrounding