At equilibrium, when no net diffusion of Na⁺ or K⁺ is occurring through the membrane, Na⁺-K⁺ pumps do not have to pump Na⁺ or K⁺.

Question

Quizplus · Accepted Answer

At equilibrium, the concentration of Na⁺ and K⁺ on either side of the membrane is the same, but Na⁺-K⁺ pump constantly work to maintain these concentration gradients. Therefore, even at equilibrium, Na⁺-K⁺ pumps still have to pump Na⁺ and K⁺ to maintain the ion concentration gradients across the membrane.

At Equilibrium, When No Net Diffusion of Na⁺ or K⁺