The permeability of fish gills with comments on the osmotic behaviour of cellular membranes.
The permeability of eel gills to ions, lipid-soluble and -insoluble substances has been measured under steady-state conditions. The results obtained support the multi-pathway model for transcapillary transport (Stray-Pedersen and Steen 1975). The gills are 25 times more permeable to THO than to Na+ or K+. Metabolic inhibitors do not affect the transfer of substances across the gills. Exposure to EDTA or MS-222 changes the permeability properties to resemble those of an aquous barrier. The gills are 10 times less water permeable than the capillaries of the rete mirabile.
D000818:Animals; D000983:Antipyrine / Q000378:metabolism; D001566:Benzocaine / Q000494:pharmacology; D002462:Cell Membrane / Q000378:metabolism*; D002712:Chlorides / Q000378:metabolism; D003486:Cyanides / Q000494:pharmacology; D003864:Depression, Chemical; D003911:Dextrans / Q000378:metabolism; D004347:Drug Interactions; D004492:Edetic Acid / Q000494:pharmacology; D004524:Eels / Q000378:metabolism*; D000431:Ethanol / Q000378:metabolism; D005880:Gills / Q000378:metabolism*; D009995:Osmosis / Q000187:drug effects; D010042:Ouabain / Q000494:pharmacology; D011188:Potassium / Q000378:metabolism; D012964:Sodium / Q000378:metabolism; D013268:Stimulation, Chemical; D013395:Sucrose / Q000378:metabolism; D013696:Temperature; D014508:Urea / Q000378:metabolism; D014867:Water / Q000378:metabolism; D014882:Water-Electrolyte Balance / Q000187:drug effects*
D002712:Chlorides; D003486:Cyanides; D003911:Dextrans; D014867:Water; D000431:Ethanol; D013395:Sucrose; D010042:Ouabain; D014508:Urea; D004492:Edetic Acid; D012964:Sodium; D011188:Potassium; D000983:Antipyrine; D001566:Benzocaine