osmoregulation

osmoregulation
/oz'moh reg'yeuh lay"sheuhn, os'-/, n.
the process by which cells and simple organisms maintain fluid and electrolyte balance with their surroundings.
[1930-35; OSMO- + REGULATION]

* * *

      in biology, maintenance by an organism of an internal balance between water and dissolved materials regardless of environmental conditions. In many marine organisms osmosis (the passage of solvent through a semipermeable membrane) occurs without any need for regulatory mechanisms because the cells have the same osmotic pressure as the sea. Other organisms, however, must actively take on, conserve, or excrete water or salts in order to maintain their internal water-mineral content.

* * *


Universalium. 2010.

Игры ⚽ Нужно сделать НИР?

Look at other dictionaries:

  • OSMORÉGULATION — Il est couramment admis que la vie sur la Terre a pris naissance dans le milieu marin et que les autres biotopes (eaux douces, saumâtres, sursalées; sol; atmosphère terrestre) ont été colonisés ultérieurement par les êtres vivants. Ces divers… …   Encyclopédie Universelle

  • Osmoregulation — is the active regulation of the osmotic pressure of an organism s fluids to maintain the homeostasis of the organism s water content; that is it keeps the organism s fluids from becoming too diluted or too concentrated. Osmotic pressure is a… …   Wikipedia

  • Osmoregulation — Osmoregulation,   das Einhalten eines bestimmten osmotischen Drucks in den Zell und Körperflüssigkeiten von Organismen. Osmoregulation bedeutet v. a. Wasseraustausch und aktiver, Energie verbrauchender Ionentransport durch semipermeable Membranen …   Universal-Lexikon

  • Osmoregulation — Osmorégulation Importance du maintien de l isotonicité pour les globules rouges. L osmorégulation est l ensemble des processus homéostatiques qui maintiennent l osmolarité d un être vivant à son niveau normal, c est à dire qui interviennent dans… …   Wikipédia en Français

  • Osmoregulation — Osmoregulation, 1) Tiere: alle Vorgänge, die der Konstanthaltung eines »inneren Milieus«, d.h. eines eigenen osmotischen Wertes der extrazellulären Körperflüssigkeiten (Blut, Interzellularflüssigkeit) gegenüber dem Außenmedium, dienen. Erst nach… …   Deutsch wörterbuch der biologie

  • osmoregulation — ► NOUN Biology ▪ the maintenance of constant osmotic pressure in the fluids of an organism by the control of water and salt concentrations. DERIVATIVES osmoregulatory adjective …   English terms dictionary

  • Osmoregulation — Salzaustritt an den Blättern der Mangrove Avicennia germinans Als Osmoregulation wird in der Biologie die Regulation des osmotischen Drucks der Körperflüssigkeiten eines Organismus bezeichnet. Ihre biologische Aufgabe ist die Homöostase des… …   Deutsch Wikipedia

  • Osmorégulation — Importance du maintien de l isotonicité pour les globules rouges. L osmorégulation est l ensemble des processus homéostatiques qui maintiennent l osmolarité d un être vivant à son niveau normal, c est à dire qui interviennent dans la régulation… …   Wikipédia en Français

  • osmoregulation — noun Etymology: osmosis + regulation Date: 1927 regulation of osmotic pressure especially in the body of a living organism • osmoregulatory adjective …   New Collegiate Dictionary

  • osmoregulation — maintenance of a proper balance of salts and water within an organism. Freshwater fish regulate hyperosmotically as they tend to lose salts and take up water. They have a glomerular kidney which secretes very dilute urine (up to 20% of body… …   Dictionary of ichthyology

  • osmoregulation — n. [Gr. osmos, pushing; L. regulatus, regulated] Maintaining the osmotic pressure in the body by regulating the amount of water and salts, effected by the removal of salts, excretory products or water by the excretory organs …   Dictionary of invertebrate zoology

Share the article and excerpts

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