Final answer:
The sodium-potassium pump is a process in biology that helps maintain an electrical gradient across the semipermeable membrane of a nerve cell.
Step-by-step explanation:
The subject of this question is Biology and it relates to the transport of potassium and sodium ions across the semipermeable membrane surrounding a nerve cell. This process is known as the sodium-potassium pump or Na+/K+ ATPase.
The Na+/K+ pump is an important ion pump found in the membranes of many types of cells, but it is particularly abundant in nerve cells. It works by transporting sodium out of the cell and moving potassium into the cell, helping to maintain an electrical gradient across the cell membrane.
The maintenance of this electrical gradient is crucial for nerve cells and plays a role in generating and transmitting electrical signals in the form of action potentials.