Cargando…

The Mechanism of Sodium and Chloride Uptake by the Gills of a Fresh-Water Fish, Carassius auratus : I. Evidence for an independent uptake of sodium and chloride ions

Carassius auratus placed in a dilute sodium chloride solution (400 µM) is able to absorb sodium and chloride ions at very different rates, or to absorb one ion and to lose the other. This is the case not only for fish which have been previously kept in choline chloride or sodium sulfate solutions or...

Descripción completa

Detalles Bibliográficos
Autores principales: García Romeu, F., Maetz, J.
Formato: Texto
Lenguaje:English
Publicado: The Rockefeller University Press 1964
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2195373/
https://www.ncbi.nlm.nih.gov/pubmed/14192553
_version_ 1782147830425583616
author García Romeu, F.
Maetz, J.
author_facet García Romeu, F.
Maetz, J.
author_sort García Romeu, F.
collection PubMed
description Carassius auratus placed in a dilute sodium chloride solution (400 µM) is able to absorb sodium and chloride ions at very different rates, or to absorb one ion and to lose the other. This is the case not only for fish which have been previously kept in choline chloride or sodium sulfate solutions or deionized water, in order to stimulate their absorption processes, but also in control fish which have not been deprived of sodium or chloride. The absorption of sodium or chloride appears to be unaffected by the presence of a nonpermeant co-ion such as choline or sulfate. Conductivity measurements of the external medium show that during ion uptake the conductivity is constant or increases slowly. This suggests the existence of exchange processes between the ions absorbed and endogenous ions excreted. It is unlikely that potassium or calcium is exchanged for sodium, because of the low permeability of the gills to these ions. Finally, the flux ratios observed for both sodium and chloride ions in the present investigation can only be explained, in relation to their electrochemical gradients across the gills, in terms of active transport.
format Text
id pubmed-2195373
institution National Center for Biotechnology Information
language English
publishDate 1964
publisher The Rockefeller University Press
record_format MEDLINE/PubMed
spelling pubmed-21953732008-04-23 The Mechanism of Sodium and Chloride Uptake by the Gills of a Fresh-Water Fish, Carassius auratus : I. Evidence for an independent uptake of sodium and chloride ions García Romeu, F. Maetz, J. J Gen Physiol Article Carassius auratus placed in a dilute sodium chloride solution (400 µM) is able to absorb sodium and chloride ions at very different rates, or to absorb one ion and to lose the other. This is the case not only for fish which have been previously kept in choline chloride or sodium sulfate solutions or deionized water, in order to stimulate their absorption processes, but also in control fish which have not been deprived of sodium or chloride. The absorption of sodium or chloride appears to be unaffected by the presence of a nonpermeant co-ion such as choline or sulfate. Conductivity measurements of the external medium show that during ion uptake the conductivity is constant or increases slowly. This suggests the existence of exchange processes between the ions absorbed and endogenous ions excreted. It is unlikely that potassium or calcium is exchanged for sodium, because of the low permeability of the gills to these ions. Finally, the flux ratios observed for both sodium and chloride ions in the present investigation can only be explained, in relation to their electrochemical gradients across the gills, in terms of active transport. The Rockefeller University Press 1964-07-01 /pmc/articles/PMC2195373/ /pubmed/14192553 Text en Copyright ©, 1964, by The Rockefeller Institute Press This article is distributed under the terms of an Attribution–Noncommercial–Share Alike–No Mirror Sites license for the first six months after the publication date (see http://www.rupress.org/terms). After six months it is available under a Creative Commons License (Attribution–Noncommercial–Share Alike 4.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/4.0/).
spellingShingle Article
García Romeu, F.
Maetz, J.
The Mechanism of Sodium and Chloride Uptake by the Gills of a Fresh-Water Fish, Carassius auratus : I. Evidence for an independent uptake of sodium and chloride ions
title The Mechanism of Sodium and Chloride Uptake by the Gills of a Fresh-Water Fish, Carassius auratus : I. Evidence for an independent uptake of sodium and chloride ions
title_full The Mechanism of Sodium and Chloride Uptake by the Gills of a Fresh-Water Fish, Carassius auratus : I. Evidence for an independent uptake of sodium and chloride ions
title_fullStr The Mechanism of Sodium and Chloride Uptake by the Gills of a Fresh-Water Fish, Carassius auratus : I. Evidence for an independent uptake of sodium and chloride ions
title_full_unstemmed The Mechanism of Sodium and Chloride Uptake by the Gills of a Fresh-Water Fish, Carassius auratus : I. Evidence for an independent uptake of sodium and chloride ions
title_short The Mechanism of Sodium and Chloride Uptake by the Gills of a Fresh-Water Fish, Carassius auratus : I. Evidence for an independent uptake of sodium and chloride ions
title_sort mechanism of sodium and chloride uptake by the gills of a fresh-water fish, carassius auratus : i. evidence for an independent uptake of sodium and chloride ions
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2195373/
https://www.ncbi.nlm.nih.gov/pubmed/14192553
work_keys_str_mv AT garciaromeuf themechanismofsodiumandchlorideuptakebythegillsofafreshwaterfishcarassiusauratusievidenceforanindependentuptakeofsodiumandchlorideions
AT maetzj themechanismofsodiumandchlorideuptakebythegillsofafreshwaterfishcarassiusauratusievidenceforanindependentuptakeofsodiumandchlorideions
AT garciaromeuf mechanismofsodiumandchlorideuptakebythegillsofafreshwaterfishcarassiusauratusievidenceforanindependentuptakeofsodiumandchlorideions
AT maetzj mechanismofsodiumandchlorideuptakebythegillsofafreshwaterfishcarassiusauratusievidenceforanindependentuptakeofsodiumandchlorideions