Question

The sodium-potassium pump makes the cell interior more ______ by pumping ______ sodium ions out of the cell for every ______ potassium ions pumped in.

1) negative, 3 , 2
2) negative, 2, 3
3) positive, 3 , 2
4) positive, 2 , 3
5) negative, 4 ,3

Answer 1

The sodium-potassium pump forces out three (positive) Na+ ions for every two (positive) K+ ions it pumps in, thus the cell loses a net positive charge of one at every cycle of the pump.

Step-by-step explanation:

The sodium-potassium pump forces out three (positive) Na+ ions for every two (positive) K+ ions it pumps in, thus the cell loses a net positive charge of one at every cycle of the pump.