Sodium and potassium ions need to be pumped simultaneously against their concentration gradients. Which one of the transport proteins would be most effective at this?
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 …
Tue Nov 05 2002 13:30:00 GMT-0500 (Eastern Standard Time) · In an antiporter two species of ion or other solutes are pumped in opposite directions across a membrane. One of these species is allowed to flow from high to low concentration which yields the entropic energy to drive the transport of the other solute from a low concentration region to a high one .. An example is the sodium -calcium exchanger or antiporter which allows three sodium ions …
Action potential - Wikipedia
Na+/K+-ATPase - Wikipedia
Na+/K+-ATPase - Wikipedia
As the membrane potential is increased sodium ion channels open allowing the entry of sodium ions into the cell. This is followed by the opening of potassium ion channels that permit the exit of potassium ions from the cell. The inward flow of sodium ions increases the concentration of positively charged cations in the cell and causes depolarization where the potential of the cell is higher ...
The electron transport chain (ETC) is a series of protein complexes that transfer electrons from electron donors to electron acceptors via redox reactions (both reduction and oxidation occurring simultaneously ) and couples this electron transfer with the transfer of protons (H + ions ) across a membrane.The electron transport chain is built up of peptides enzymes and other molecules.
Hemodialysis was one of the most common procedures performed in U.S. hospitals in 2011 occurring in 909 000 stays (a rate of 29 stays per 10 000 population). This was an increase of 68 percent from 1997 when ther...
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