sodium pump

sodium pump
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 a specialized plasma membrane protein linking the hydrolysis of ATP to the active transport of intracellular sodium ions out of the cell and extracellular potassium ions into the cell to create an electrical and chemical gradient across the plasma membrane necessary for vital cell functions (as nerve cell excitation and cell volume regulation)
2) the specialized plasma membrane protein that controls the sodium pump mechanism

* * *

sodium-potassium pump Na+,K+-ATPase.

Medical dictionary. 2011.

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  • sodium pump — noun 1. : a molecular mechanism by which sodium ions are actively transported across a cell membrane ; especially : one by which a high concentration of potassium ions and a low concentration of sodium ions are maintained within a cell and that… …   Useful english dictionary

  • sodium pump — noun Date: 1951 a molecular mechanism by which sodium ions are actively transported across a cell membrane; especially one that is controlled by a specialized plasma membrane protein by which a high concentration of potassium ions and a low… …   New Collegiate Dictionary

  • sodium pump — so′dium pump n. phl an energy consuming mechanism in cell membranes that transports sodium ions across the membrane, in exchange for potassium ions or other substances • Etymology: 1960–65 …   From formal English to slang

  • sodium pump — A mechanism of neurones to move sodium ions out of the cell during the recovery phase …   Dictionary of invertebrate zoology

  • sodium pump — See sodium potassium ATPase …   Dictionary of molecular biology

  • sodium pump — an energy consuming mechanism in cell membranes that transports sodium ions across the membrane, in exchange for potassium ions or other substances. [1960 65] * * * …   Universalium

  • sodium pump — noun the transport of sodium ions across biological membranes using the metabolic energy of ATP …   Wiktionary

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