Na+/K+ pump

Definition

The Na+/K+ pump is a membrane protein found in animal cells that actively transports sodium ions (Na+) out of the cell and potassium ions (K+) into the cell, against their concentration gradients.

Related terms

Sodium ion (Na+): A positively charged ion that is pumped out of the cell by the Na+/K+ pump to maintain proper ion balance.

Potassium ion (K+): A positively charged ion that is pumped into the cell by the Na+/K+ pump to maintain proper ion balance.

Concentration gradient: The gradual difference in solute concentration between two regions. In this case, it refers to the difference in concentration of sodium and potassium ions inside and outside of the cell.