Science Homework Help

Select the descriptions that apply to the sodium-potassium pump. More than one answer

1. Sodium ions and potassium ions move into and out of the plasma membrane by osmosis.

2. The pump helps to maintain the concentration of sodium and potassium ions in living cells.

3. The pump is an active mechanism for transporting ions through the plasma membrane.

4. The concentration gradient of the ions determines the direction of movement through the pump.