Electrogenic pump

Definition

An electrogenic pump is a protein that moves ions across a membrane, creating an electrical gradient. This process typically involves active transport and requires energy in the form of ATP.

5 Must Know Facts For Your Next Test

1. The sodium-potassium pump is a key example of an electrogenic pump, moving 3 Na+ ions out and 2 K+ ions into the cell.
2. Electrogenic pumps help maintain the resting membrane potential in cells.
3. These pumps play a crucial role in nerve impulse transmission by establishing ion concentration gradients.
4. Electrogenic pumps are essential for osmoregulation and maintaining cell volume.
5. ATP hydrolysis provides the energy required for the function of most electrogenic pumps.

Review Questions

Related terms

ActiveTransport: The movement of molecules across a cell membrane using energy, usually against their concentration gradient.

SodiumPotassiumPump: A type of electrogenic pump that moves sodium out of cells and potassium into cells, essential for maintaining cellular functions.

MembranePotential: The voltage difference across a cell's plasma membrane due to the distribution of ions.