sodium-potassium pump

sodium-potassium pump

      in cellular physiology, a protein that has been identified in many cells that maintains the internal concentration of potassium ions [K+] higher than that in the surrounding medium (blood, body fluid, water) and maintains the internal concentration of sodium ions [Na+] lower than that of the surrounding medium. The pump, which has adenosine-triphosphatase (ATPase) activity, traverses the cell membrane and is activated by external [K+] and internal [Na+]. This enzyme uses metabolic energy to transport (pump) Na+ outward and K+ inward. The resting potential of cells and related bioelectric phenomena such as the action potential depend on the steady state difference in concentrations of Na+ and K+ maintained by the pump. Other ion pumps, transporting different ions, have also been identified.

* * *


Universalium. 2010.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • Pompe Sodium/Potassium — La pompe sodium/potassium ou Na+/K+ ATP ase est une enzyme transmembranaire dont l activité enzymatique utilise l énergie issue de la dégradation de l ATP en ADP et phosphore inorganique pour transporter des ions potassium et sodium contre leur… …   Wikipédia en Français

  • Pompe Sodium Potassium — Pompe sodium/potassium La pompe sodium/potassium ou Na+/K+ ATP ase est une enzyme transmembranaire dont l activité enzymatique utilise l énergie issue de la dégradation de l ATP en ADP et phosphore inorganique pour transporter des ions potassium… …   Wikipédia en Français

  • Pompe sodium/potassium — La pompe sodium/potassium ou Na+/K+ ATP ase est une enzyme transmembranaire dont l activité enzymatique utilise l énergie issue de la dégradation de l ATP en ADP et phosphore inorganique pour transporter des ions potassium et sodium contre leur… …   Wikipédia en Français

  • Pompe sodium-potassium — La pompe sodium potassium ou Na+ K+ ATPase est une enzyme transmembranaire dont l activité enzymatique utilise l énergie issue de la dégradation de l ATP en ADP et phosphore inorganique pour transporter des ions potassium et sodium contre leur… …   Wikipédia en Français

  • sodium pump — n 1) a molecular mechanism by which sodium ions are actively transported across a cell membrane esp one by which a high concentration of potassium ions and a low concentration of sodium ions are maintained within a cell and that is controlled by… …   Medical dictionary

  • Potassium in biology — Potassium is the an essential mineral macronutrient and is the main intracellular ion for all types of cells. It is important in maintaining fluid and electrolyte balance in the body. Function in the Body Potassium is the major cation (positive… …   Wikipedia

  • Potassium — The major positive ion (cation) found inside of cells. The chemical notation for potassium is K+. The proper level of potassium is essential for normal cell function. An abnormal increase of potassium (hyperkalemia) or decrease of potassium… …   Medical dictionary

  • Sodium-calcium exchanger — solute carrier family 8 (sodium/calcium exchanger), member 1 Identifiers Symbol SLC8A1 Alt. symbols NCX1 Entrez 6546 …   Wikipedia

  • Potassium — (pronEng|pəˈtæsiəm) is a chemical element. It has the symbol K ( la. kalium, from ar. qalīy), atomic number 19, and atomic mass 39.0983. The name potassium comes from the word potash , as potassium was first isolated from potash. Potassium is a… …   Wikipedia

  • pump — 1. An apparatus for forcing a gas or liquid from or to any part. 2. Any mechanism for using metabolic energy to accomplish active transport of a substance. breast p. a suction instrument for withdra …   Medical dictionary

Share the article and excerpts

Direct link
https://universalium.en-academic.com/288374/sodium-potassium_pump Do a right-click on the link above
and select “Copy Link”