Search results
Results From The WOW.Com Content Network
The sodium–potassium pump is found in many cell (plasma) membranes. Powered by ATP, the pump moves sodium and potassium ions in opposite directions, each against its concentration gradient. In a single cycle of the pump, three sodium ions are extruded from and two potassium ions are imported into the cell.
Ouabain is a cardiac glycoside that acts by non-selectively inhibiting the Na + /K +-ATPase sodium–potassium ion pump. [2] Once ouabain binds to this enzyme, the enzyme ceases to function, leading to an increase of intracellular sodium.
Another example is the hydrogen potassium ATPase (H + /K + ATPase or gastric proton pump) that acidifies the contents of the stomach. ATPase is genetically conserved in animals; therefore, cardenolides which are toxic steroids produced by plants that act on ATPases, make general and effective animal toxins that act dose dependently.
Sick cell syndrome is a medical condition characterised by reduced functioning of the cellular Na+/K+ pump, [1] which is responsible for maintaining the internal ion homeostasis. The clinical result is a rise in blood K+ level and drop of blood Na+ levels
Na+/K+ -ATPase is an integral membrane protein responsible for establishing and maintaining the electrochemical gradients of Na and K ions across the plasma membrane. These gradients are essential for osmoregulation, for sodium- coupled transport of a variety of organic and inorganic molecules, and for electrical excitability of nerve and muscle.
Amino acids and sugars are taken up from sea water in the presence of extracellular sodium and is driven by the NA + /K +-ATPase pump. [ 1 ] In the roots of plants , the H+/K+ symporters are only one member of a group of several symporters/antiporters that specifically allow only one charged hydrogen ion (more commonly known as a proton) and ...
The basic function of the Na-K-Cl cotransporter (NKCC). The Na–K–Cl cotransporter (NKCC) is a transport protein that aids in the secondary active transport of sodium, potassium, and chloride into cells. [1]
At the resting voltage potential, a pump is pumping 2 K+ ions into the cell, and pumps 3 Na+ ions out of the cell. Since this is a nett electrical current, it makes the cell's membrane voltage slightly more negative. This causes a passive influx of 1 K+ ion, driven by the membrane voltage.