Question

In the resting state of the neural membrane, diffusion due to concentration gradients, if allowed, would drive
A. `Ca^(2+)` into the cell
B. `K^+` and `Na^+` out of the cell
C. `Na^+` into the cell
D. `Na^+` out of the cell

Answer 1

Correct Answer - D
The concentration gradients across the resting membrane are maintained by the active transport of ions by the sodium-potassium pump which transports `3 Na^+` outward for `2 K^+` into cell.