an energy-consuming mechanism in cell membranes that transports sodium ions across the membrane, in exchange for potassium ions or other substances.
sodium pump n.
A biologic mechanism that uses metabolic energy stored in ATP to achieve active transport of sodium ions across a membrane, such as the cell membrane or the multicellular membranes that make up the walls of renal tubules.
noun, Chemistry. 1. borax1 .
noun, Chemistry. 1. a white, crystalline compound, C 7 H 5 NaO 3 , soluble in water, alcohol, and glycerol: used in medicine as an analgesic, antipyretic, and anti-inflammatory, and as a preservative.
noun, Chemistry. 1. a white, crystalline, water-soluble solid, Na 2 SO 4 , used chiefly in the manufacture of dyes, soaps, detergents, glass, and ceramic glazes. sodium sulfate n. A white crystalline compound used as a mild natural laxative and in larger doses as a hydragogue cathartic.
noun, Chemistry. 1. a yellow or brick-red, crystalline, deliquescent, water-soluble solid, Na 2 S, used chiefly in the manufacture of dyes, soaps, and rubber, as a depilatory for leather, and in the flotation of powdered lead and copper ores.