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Page "Membrane potential" ¶ 25
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sodium-potassium and exchange
The sodium-potassium pump uses energy derived from ATP to exchange sodium for potassium ions across the membrane.
A major contribution to establishing the membrane potential is made by the sodium-potassium exchange pump.
The bicarbonate ion will stimulate an exchange of cellular H < sup >+</ sup > for Na < sup >+</ sup >, thus leading to stimulation of the sodium-potassium ATPase.
By increasing the delivery of sodium to the distal renal tubule, chlorthalidone indirectly increases potassium excretion via the sodium-potassium exchange mechanism ( i. e. apical ROMK / Na channels coupled with basolateral NKATPases ).
These mediator proteins are not produced, and so stimulation of sodium-potassium exchange sites in the collection tubule does not occur.

sodium-potassium and pump
Normally, sodium-potassium pumps in the membrane of cells ( in this case, cardiac myocytes ) pump potassium ions in and sodium ions out.
Examples of active transport include the transportation of sodium out of the cell and potassium into the cell by the sodium-potassium pump.
The action of the sodium-potassium pump is an example of primary active transport.
A primary ATPase universal to all life is the sodium-potassium pump, which helps to maintain the cell potential.
* The pump for sodium and potassium is called sodium-potassium pump or Na < sup >+</ sup >/ K < sup >+</ sup >- ATPase
Na < sup >+</ sup >/ K < sup >+</ sup >- ATPase ( Sodium-potassium adenosine triphosphatase, also known as Na < sup >+</ sup >/ K < sup >+</ sup > pump, sodium-potassium pump, or sodium pump ) is an enzyme () ( an electrogenic transmembrane ATPase ) located in the plasma membrane of all animal cells.
The mechanism responsible for this is the sodium-potassium pump, which moves these two ions in opposite directions across the plasma membrane.
The sodium-potassium pump was discovered in the 1950s by a Danish scientist, Jens Christian Skou, who was awarded a Nobel Prize in 1997.
The sodium-potassium pump moves 3 sodium ions out and moves 2 potassium ions in, thus in total removing one positive charge carrier from the intracellular space.
Not only the mechanism of the sodium-potassium pump alone is responsible for the generation of the resting membrane potential.
The chief function of the inner segment is to provide ATP ( energy ) for the sodium-potassium pump.
ATP provided by the inner segment powers the sodium-potassium pump.
Denmark's first professor of sociology was a member of the faculty of Aarhus University ( Theodor Geiger, from 1938 – 1952 ), and in 1997 Professor Jens Christian Skou received the Nobel Prize in Chemistry for his discovery of the sodium-potassium pump.
However, in his paper he was wary of identifying the enzyme with the active ion movement, so he left out the term “ sodium-potassium pump ” from the title of his paper.
Ouabain did indeed inhibit the enzyme, thus establishing a link between the enzyme and the sodium-potassium pump.
Thermogenesis can also be produced by leakage of the sodium-potassium pump and the Ca < sup > 2 +</ sup > pump.
This pump operates in a conceptually similar way to the sodium-potassium pump, except that in each cycle it exchanges three Na < sup >+</ sup > from the extracellular space for one Ca < sup >++</ sup > from the intracellular space.

sodium-potassium and is
An important example is the sodium-potassium exchanger ( or Na < sup >+</ sup >/ K < sup >+</ sup > ATPase ), which establishes the ionic concentration balance that maintains the cell potential.
NaK, or sodium-potassium alloy, an alloy of potassium ( K ) and sodium ( Na ), is usually liquid at room temperature.
Its most important effect is to pump calcium outward — it also allows an inward flow of sodium, thereby counteracting the sodium-potassium pump, but, because overall sodium and potassium concentrations are much higher than calcium concentrations, this effect is relatively unimportant.
The metal is either sodium or a sodium-potassium alloy ( Na < sub > 2 </ sub > K ).

sodium-potassium and .
Digitalis works by inhibiting sodium-potassium ATPase.
Such food staples have fundamentally altered several key nutritional characteristics of the human diet since the Paleolithic era, including glycemic load, fatty acid composition, macronutrient composition, micronutrient density, acid-base balance, sodium-potassium ratio, and fiber content.
The binding of two acetylcholine molecules results in a conformational change in the receptor that opens the sodium-potassium channel of the nicotinic receptor.
Powered by a liquid sodium-potassium thermionic converter driven by a nuclear reactor containing around of Uranium 235, the satellite was intended for long-term on-orbit observation, but by December 1977 the satellite had deviated from its designed orbit and its flightpath was becoming increasingly erratic.

exchange and pump
This increase in intracellular sodium makes the actions of the Na / Ca exchange pump unfavorable, thereby decreasing sodium influx and calcium efflux via this pump.
In mammals, the function of the right side of the heart ( see right heart ) is to collect de-oxygenated blood, in the right atrium, from the body ( via superior and inferior vena cavae ) and pump it, through the tricuspid valve, via the right ventricle, into the lungs ( pulmonary circulation ) so that carbon dioxide can be dropped off and oxygen picked up ( gas exchange ).
Indicative of the car's utilitarian design, the interior featured painted metal surfaces, a metal dash consolidating instruments in a single, circular binnacle, adjustable front seats, a fold-down rear seat, optional swing-out rear windows, front windows with pivoting vent windows, heating via air-to-air exchange manifolds operating off the engine's heat, and a windshield washer system that eschewed the complexity and cost of an additional electric pump and instead received its pressurization from the car's spare tire ( located in the front luggage compartment ) which was accordingly overinflated to accommodate the washer function.
Ground source heat pumps are simpler and more reliable than air source heat pumps-they do not need fan systems or defrosting systems and can be housed inside-but the need for a ground heat exchanger requires a higher initial capital cost in exchange for lower annual running costs as well-designed ground source heat pump systems enjoy a more efficient operation.
* Direct exchange geothermal heat pump, an advanced energy-efficiency technology
Nutrient uptake in the soil is achieved by cation exchange, where root hairs pump hydrogen ions ( H < sup >+</ sup >) into the soil through proton pumps.
Nutrient uptake in the soil is achieved by cation exchange, wherein root hairs pump hydrogen ions ( H +) into the soil through proton pumps.
The function of the right side of the heart ( see right heart ) is to collect de-oxygenated blood, in the right atrium, from the body ( via superior and inferior vena cavae ) and pump it, via the right ventricle, into the lungs ( pulmonary circulation ) so that carbon dioxide can be dropped off and oxygen picked up ( gas exchange ).
If the numbers of each type of ion were equal, the pump would be electrically neutral, but, because of the three-for-two exchange, it gives a net movement of one positive charge from intracellular to extracellular for each cycle, thereby contributing to a positive voltage difference.
The Na < sup >+</ sup >/ K < sup >+</ sup >- ATPase is a P-type pump that extrudes 3Na < sup >+</ sup > ions in exchange for 2K < sup >+</ sup > ions for each hydrolytic cleavage of ATP.
Kirk returns the pump and reassures him that the Horta are intelligent and peaceful and suggests they could assist the miners by locating new deposits of minerals in exchange for being left alone.
The separate feed pump allows easy control of the rate of water exchange through the skimmer and for many aquarists this is one of the important attractions of recirculating skimmer designs.
Disadvantages: The pump cannot be utilized for any other hydraulic function in an easy way and cooling can be a problem due to limited exchange of oil flow.
High power closed loop systems generally must have a ' flush-valve ' assembled in the circuit in order to exchange much more flow than the basic leakage flow from the pump and the motor, for increased cooling and filtering.
thermosyphon ) refers to a method of passive heat exchange based on natural convection, which circulates liquid without the necessity of a mechanical pump.

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