{"refrec":{"BRefID":280398,"RR":"<b>Péqueux, A.; Gilles, R.</b> (1981). Na<sup>+</sup> fluxes across isolated perfused gills of the chinese crab <i>Eriocheir sinensis</i>. <i>J. Exp. Biol. 92(1)</i>: 173-186","BEntID":272417,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>J. Exp. Biol. 92(1)</i>: 173-186","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Péqueux, A.; Gilles, R.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Péqueux, A.; Gilles, R.","Englishabstract":"Sodium transport processes in the branchial epithelium of euryhaline crustaceans have been investigated using a perfused preparation of gills isolated from Chinese crabs <i>Eriocheir sinensis</i> acclimated to dilute (FW) and to concentrated (SW) media.The results clearly establish the existence of a functional difference between the different pairs of branchiae with respect to their participation in the regulation of the blood Na<sup>+</sup> content.In FW-acclimated animals, the Na<sup>+</sup> active uptake which counter-balances the salt loss along the concentration gradient is mostly achieved across the three posterior pairs of gills. Conversely, the Na<sup>+</sup> fluxes measured in the three anterior pairs are essentially passive and carrier-mediated.Further characterization of the Na<sup>+</sup> uptake system present in the posterior gills by means of inhibitors like ouabain and ethacrynic acid indicates the existence of at least two spatially separated components of the Na<sup>+</sup> carrying system.It is shown that NH<sub>4</sub><sup>+</sup> may be used as co-ion for Na<sup>+</sup> but that such a coupling can only account for a very small part of the Na<sup>+</sup> actively transported inward. The existence of an electrogenic mechanism or of another coupled system has thus to be postulated but remains at present a matter of speculation.To study FW-to-SW and SW-to-FW acclimation, Na<sup>+</sup> fluxes were measured in isolated gills of SW-acclimated crabs and of FW crabs perfused and incubated in SW conditions.During acclimation to SW the Na<sup>+</sup> active uptake in the posterior gills is abolished primarily as a result of inhibition of the Na<sup>+</sup> carrier activity.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Na<sup>+</sup> fluxes across isolated perfused gills of the chinese crab <i>Eriocheir sinensis</i>","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-04-23 01:32:42.100023","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":1981,"MonPub":null,"DateUpdate":"2016-11-28","DateCreate":"2016-10-09","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:A1981LX52100014","VABBcode":null,"OpenAcc":0},"refs":null,"anarec":{"AnaID":280398,"PubliDate":1981,"Pagination":"173-186","XtraPublOfAnaID":null,"ISBN":null,"Volume":"92","Issue":"1","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43227,"SerRR":"The Journal of Experimental Biology. Cambridge University Press: London.  ISSN 0022-0949; e-ISSN 1477-9145","StandardTitleSer":"The Journal of Experimental Biology","ISSN":"0022-0949","AbbrevSer":"J. Exp. 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