Question

The "sodium-potassium pump" pumps ___________.

• A. sodium ions out and potassium ions in
• B. sodium ions in and potassium ions out
• C. sodium and potassium ions in
• D. sodium and potassium ions out

Answer 1

The correct option is A

sodium ions out and potassium ions in

The Na+/K+ pump is found in the membranes of many types of cells. In particular, it plays a very important role in nerve cell membranes.3 positive ions(Na+) are pumped out of the cell (towards ECF) for every 2 positive ions (K+) pumped into the cell (towards ICF).