1. An apparatus for forcing a gas or liquid from or to any part. 2. Any mechanism for using metabolic energy to accomplish active transport of a substance.
- breast p. a suction instrument for withdrawing milk from the breast.
- calcium p. a membranal protein that can transport calcium ions across the membrane using energy from ATP.
- calf p. muscular activity of calf that promotes venous flow towards the heart.
- Carrel-Lindbergh p. a perfusion device designed for use in culture of whole organs.
- constant infusion p. an electrically driven device for delivery from a reservoir of a constant, often very small, volume of solution over a prolonged period of time.
- dental p. SYN: saliva ejector.
- hydrogen p. molecular mechanism for acid secretion from gastric parietal cells based on the activity of a H+-K+-ATPase.
- intraaortic balloon p. an externally actuated and intermittently inflatable balloon placed into the descending aorta and that, on activation during diastole, augments blood pressure and organ perfusion by its pulsatile thrust; then, on deflation, decreases the cardiac work with each systole—the so-called counterpulsation principle—by reducing cardiac afterload.
- ion p. a membranal complex of proteins that is capable of transporting ions against a concentration gradient using the energy from ATP.
- jet ejector p. a suction p. in which fluid under high pressure is forced through a nozzle into an abruptly larger tube where a high-velocity jet, at a low pressure in accordance with the Bernoulli law, entrains gas or liquid from a side tube opening just beyond the end of the nozzle to create suction; e.g., the p. by which steam is used to evacuate an autoclave, a water aspirator.
- proton p. molecular mechanism for the net transport of protons across a membrane; usually involves the activity of an ATPase.
- saliva p. SYN: saliva ejector.
- sodium p. a biologic mechanism that uses metabolic energy from ATP to achieve active transport of sodium across a membrane; sodium pumps expel sodium from most cells of the body, sometimes coupled with the transport of other substances, and also serve to move sodium across multicellular membranes such as renal tubule walls.
- sodium-potassium p. a membrane-bound transporter found in nearly all mammalian cells that transports potassium ions into the cytoplasm from the extracellular fluid while simultaneously transporting sodium ions from the cytoplasm to the extracellular fluid. The p. transports both ions against large electrochemical potential gradients and maintains the potassium concentration of the cytoplasm far above, and the sodium concentration far below, their extracellular values. The p. is an enzyme that transports two potassium ions in exchange for three sodium ions in a reaction driven by hydrolysis of one molecule of ATP to form ADP plus one inorganic phosphate ion.
- stomach p. an apparatus for removing the contents of the stomach by means of suction.
* * *
putative metalloproteinase

* * *

pump 'pəmp n
1) a device that raises, transfers, or compresses fluids or that attenuates gases esp. by suction or pressure or both
3) an act or the process of pumping
4) an energy source (as light) for pumping atoms or molecules
5) a mechanism by which atoms, ions, or molecules are transported across cell membranes see PROTON PUMP, SODIUM PUMP
pump vi to work a pump: raise or move a fluid with a pump vt
1) to raise (as water) with a pump
2) to draw fluid from with a pump
3) to transport (as ions) against a concentration gradient by the expenditure of energy
4 a) to excite (as atoms or molecules) esp. so as to cause emission of coherent monochromatic electromagnetic radiation (as in a laser)
b) to energize (as a laser) by pumping

* * *

(pump) 1. an apparatus for drawing or forcing fluids or gases. 2. to draw or force fluids or gases.

Medical dictionary. 2011.

Игры ⚽ Нужно решить контрольную?

Look at other dictionaries:

  • Pump — Pump, n. [Akin to D. pomp, G. pumpe, F. pompe; of unknown origin.] An hydraulic machine, variously constructed, for raising or transferring fluids, consisting essentially of a moving piece or piston working in a hollow cylinder or other cavity,… …   The Collaborative International Dictionary of English

  • Pump It Up — Разработчики Andamiro/F2/Freevolt/Nexcade Издатель …   Википедия

  • Pump It — «Pump It» Сингл The Black Eyed Peas из альбома Monkey Business …   Википедия

  • Pump It Up — Saltar a navegación, búsqueda Una máquina Pump it Up. Pump It Up es una serie de videojuegos arcade de simulación de baile lanzado por Andamiro en 1999. Consta de una máquina con una pantalla, parlantes y luces conectada a un tablero en el suelo …   Wikipedia Español

  • pump — pump1 [pump] n. [ME pumpe < MDu pompe < Sp bomba, prob. of echoic orig.] 1. any of various machines that force a liquid or gas into or through, or draw it out of, something, as by suction or pressure 2. Informal the heart vt. 1. to raise or …   English World dictionary

  • Pump It — Saltar a navegación, búsqueda «Pump It» Sencillo de The Black Eyed Peas del álbum Monkey Business Publicación 2006 Formato CD single, Descarga Digital …   Wikipedia Español

  • pump — pump; pump·abil·i·ty; pump·able; pump·age; pump·er; pump·kin; pump·less; pump·man; cryo·pump; tur·bo·pump; …   English syllables

  • PUMP — Gründung 2002 Genre Hard Rock Website http://www.pump rocks.net Aktuelle Besetzung Gesang Marcus Jürgens Gitarre Aki Reissmann …   Deutsch Wikipedia

  • pump — [pʌmp] verb [transitive] pump money/​millions etc into something FINANCE to put a lot of money into a business, plan etc: • The government has already pumped a huge amount of money into the project. * * * Ⅰ. pump UK US /pʌmp/ verb [I or T] ► …   Financial and business terms

  • Pump — Saltar a navegación, búsqueda Pump Álbum de Aerosmith Publicación 1989 Grabación 1989 …   Wikipedia Español

  • Pump — Pump, v. t. [imp. & p. p. {Pumped} (p[u^]mt; 215); p. pr. & vb. n. {pumping}.] 1. To raise with a pump, as water or other liquid. [1913 Webster] 2. To draw water, or the like, from; to from water by means of a pump; as, they pumped the well dry;… …   The Collaborative International Dictionary of English

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”