plasma membrane

plasma membrane
plasma membrane n a semipermeable limiting layer of cell protoplasm consisting of a fluid phospholipid bilayer with intercalated proteins called also cell membrane, plasmalemma

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the structure enveloping a cell, enclosing the cytoplasm and forming a selective permeability barrier; it consists of a lipid bilayer with integral and peripheral proteins and contains channels and pumps to transport substances across the membrane, as well as receptors to receive stimuli from the external environment and transduce them into intracellular signals. See Plate 12. Called also cell m., cytoplasmic m., and plasmalemma.

Medical dictionary. 2011.

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  • plasma membrane — n. a very thin living membrane surrounding the cytoplasm of a plant or animal cell: see CELL …   English World dictionary

  • plasma membrane —  Plasma Membrane  Плазматическая мембрана (цитолемма, плазмолемма)  См. клеточная мембрана …   Толковый англо-русский словарь по нанотехнологии. - М.

  • plasma membrane — plazmalema statusas T sritis augalininkystė apibrėžtis Paviršinė citoplazmos membrana, reguliuojanti medžiagų patekimą į ląstelę. atitikmenys: angl. plasma membrane; plasmalemma rus. плазмалемма; плазматическая мембрана …   Žemės ūkio augalų selekcijos ir sėklininkystės terminų žodynas

  • Plasma membrane Ca²⁺ ATPase — The plasma membrane Ca2+ ATPase (PMCA) is a transport protein in the plasma membrane of cells that serves to remove calcium (Ca2+) from the cell. It is vital for regulating the amount of Ca2+ within cells. [ cite journal | last =Jensen | first… …   Wikipedia

  • Plasma membrane lipid composition — ▪ Table Plasma membrane lipid composition by weight percent of mammalian red blood cells species lipid pig human cat rabbit horse rat cholesterol 26.8 26.0 26.8 28.9 24.5 24.7 phosphatidylcholine 13.9 17.5 18.7 22.3 22.0 31.8 sphingomyelin 15.8… …   Universalium

  • plasma membrane — noun a thin membrane (a double layer of lipids) enclosing the cytoplasm of a cell; proteins in the membrane control passage of ions (like sodium or potassium or calcium) in and out of the cell all cells have a cell membrane • Syn: ↑cell membrane …   Useful english dictionary

  • plasma membrane — The selectively permeable membrane surrounding the cell s cytoplasm; also called the cell membrane, plasmalemma, or cytoplasmic membrane …   Dictionary of microbiology

  • plasma membrane — A unit membrane surrounding the cell s protoplasm; cell membrane; plasmalemma …   Dictionary of invertebrate zoology

  • plasma membrane — noun The semipermeable membrane that surrounds the cytoplasm of a cell. Syn: cell membrane …   Wiktionary

  • plasma membrane — noun Date: 1900 a semipermeable limiting layer of cell protoplasm called also cell membrane see cell illustration …   New Collegiate Dictionary

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