Final answer:
The sodium-potassium pump moves sodium ions out and potassium ions into the cell. For every molecule of ATP hydrolyzed, three sodium ions are pumped out and two potassium ions are pumped in.
Step-by-step explanation:
The sodium-potassium pump moves sodium ions out of the cell and potassium ions into the cell. For every molecule of ATP hydrolyzed in the NaK pump, three sodium ions are pumped out and two potassium ions are pumped in.