Electrochemical forces for chloride transport in the proximal tubules of the rat kidney

The electrochemical forces for chloride transport in the proximal tubule of the rat kidney were studied using micropuncture techniques. Electrical transmembrane potentials were recorded in randomly punctured tubules with Ling‐Gerhard electrodes. Chloride activities in the luminal, cellular and inter...

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Bibliographic Details
Published in:Acta physiologica Scandinavica 1978-08, Vol.103 (4), p.363-369
Main Author: Sohtell, Morgan
Format: Article
Language:English
Subjects:
Animals
Chloride activity
chloride transport
Chlorides - physiology
electrical potentials
Electrochemistry
in vivo
Kidney Tubules, Proximal - physiology
Membrane Potentials
micro-electrodes
Microelectrodes
rat proximal tubule
Rats
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Summary:The electrochemical forces for chloride transport in the proximal tubule of the rat kidney were studied using micropuncture techniques. Electrical transmembrane potentials were recorded in randomly punctured tubules with Ling‐Gerhard electrodes. Chloride activities in the luminal, cellular and interstitial compartments were measured with ion selective micro‐electrodes. Electrical potential measurements between cell to interstitium and lumen to interstitium were ‐72.1 ± 2.6 mVand ± 0.5±1.4mV(mean ± S.D.)respectively. The calculated chloride concentrations for lumen, cell and interstitium were 133.0±10.3 mM, 8.5±1.0 mM and 99.1 ± 3.2 mM (mean ± S.D.) respectively. The net electrochemical forces, qualitatively, offer a passive chloride ion pathway through the tubular wall and a chloride equilibrium over the luminal membrane seems to exist.
ISSN:0001-6772
1365-201X
DOI:10.1111/j.1748-1716.1978.tb06229.x