Here's why:
* Active Transport: The sodium-potassium pump is an example of active transport. This means it moves substances against their concentration gradient, which requires energy input.
* ATP: The pump uses ATP (adenosine triphosphate), the primary energy currency of cells, to power its movement of sodium and potassium ions across the cell membrane.
* Function: The pump is crucial for maintaining the electrochemical gradient across the cell membrane, which is essential for nerve impulse transmission, muscle contraction, and many other cellular processes.
In summary, the sodium-potassium pump requires energy to operate, and this energy is provided by ATP.
