In the operation of sodium-potassium ATPase,Select one:Select the correct definitionthere is an obligatory coupling of sodium efflux and potassium influx.this transporter (or "pump") is electrogenic.phosphorylation and dephosphorylation respectively, are associated with the sodium and potassium transport steps.the pump transports two potassium ions for every three sodium ions.
Question
In the operation of sodium-potassium ATPase,Select one:Select the correct definitionthere is an obligatory coupling of sodium efflux and potassium influx.this transporter (or "pump") is electrogenic.phosphorylation and dephosphorylation respectively, are associated with the sodium and potassium transport steps.the pump transports two potassium ions for every three sodium ions.
Solution
The operation of the sodium-potassium ATPase involves several steps:
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There is an obligatory coupling of sodium efflux and potassium influx: This means that the pump always moves sodium ions out of the cell and potassium ions into the cell. This is a simultaneous process, meaning that for every 3 sodium ions that are pumped out, 2 potassium ions are pumped in.
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This transporter (or "pump") is electrogenic: This means that the pump creates an electrical gradient across the cell membrane. Because more positive charges are moved out of the cell than are moved in, the inside of the cell becomes more negative relative to the outside.
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Phosphorylation and dephosphorylation respectively, are associated with the sodium and potassium transport steps: This means that the pump uses the energy from ATP to move the ions across the membrane. The ATP molecule is broken down (dephosphorylated) to provide the energy for the pump to work, and then it is reformed (phosphorylated) when the pump is ready to work again.
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The pump transports two potassium ions for every three sodium ions: This means that for every cycle of the pump, 3 sodium ions are moved out of the cell and 2 potassium ions are moved in. This is what creates the electrical gradient across the cell membrane.
Similar Questions
Na+/K+ ATPase is considered to be an electrogenic pump because
The calcium ATPaseSelect one:Select the correct definitionis much simpler than the sodium-potassium pump because it has only three transmembrane regions.pumps 15 calcium ions for each molecule of ATP consumed.uses the same intracellular domain for both nucleotide binding and ion translocation.pumps calcium in a cyclical process that utilizes energy from ATP.is unique among transporters in that its pumping action involves no conformational changes.Don't know?
Almost all cells in the body contain Na K ATPase pump in their plasma membranes.it is the example of one of the following Transport mechanismSelect one:a. Uniportb. Antiportc. Co transportd. Symport
In a single pump cycle where sodium (Na+) and potassium (K+) are exchanged and ATP is used, the following is expected: 3 sodium ions enter and 2 potassium ions leaves the cell.2 sodium ion leaves and 1 potassium ion enters the cell3 sodium ions leave and 2 potassium ions enters the cell.sodium and potassium ions enter and water leaves the cell.
Choose characteristics of the sodium-potassium ion pump.Multiple select question.Pumps sodium out of the cell against its concentration gradientUses ATPIs an example of passive transportPumps potassium along its concentration gradient
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