Synthesize the process by which the sodium-potassium pump maintains cellular homeostasis.

• A. The sodium-potassium pump uses ATP hydrolysis to move sodium ions out of the cell and potassium ions into the cell, maintaining the electrochemical gradient.
• B. The sodium-potassium pump uses ATP hydrolysis to move both sodium and potassium ions against their concentration gradients into the cell.
• C. The sodium-potassium pump uses ATP hydrolysis to move sodium ions into the cell and potassium ions out of the cell.
• D. The sodium-potassium pump passively allows sodium and potassium ions to move down their concentration gradients.

Answer: (A)