Question

Choose the correct answer from the alternatives given.
The sodium potassium pump moves sodium and potassium ions across the plasma membrane by

• A. Facilitated transport
• B. Active transport
• C. Cotransport
• D. Endocytosis

Answer 1

The correct option is B Active transport

The sodium-potassium pump in a cell membrane works via active transport. It uses a carrier protein and utilizes ATP molecules. It transports the sodium ions to the extracellular space, increasing their concentration there and in turn moves potassium ions inside the cell. This pump moves three potassium ions inside the cell for every two sodium ions moved outside.

So, the correct answer is 'active transport'.