The sodium-potassium pump moves sodium and potassium ions across the plasma membrane by

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The sodium-potassium pump is an example of active transport, which requires the expenditure of energy (ATP) to move solutes against their concentration gradient. It moves sodium ions out of the cell and potassium ions into the cell, maintaining a concentration gradient that is necessary for functions such as nerve impulses and muscle contractions. Facilitated transport involves the movement of solutes down their concentration gradient with the help of transport proteins, cotransport involves the movement of two different solutes in the same direction, and endocytosis involves the uptake of extracellular material by the cell via the formation of vesicles.

The Sodium-Potassium Pump Moves Sodium and Potassium Ions Across the Plasma