HCO3‐stimulated CL efflux in the Gulf toadfish acclimated to sea water
- 1 April 1979
- journal article
- research article
- Published by Wiley in Journal of Experimental Zoology
- Vol. 208 (1), 13-16
- https://doi.org/10.1002/jez.1402080103
Abstract
Unidirectional efflux of Cl was examined in the Gulf toadfish, Opsanus beta, in artificial seawater solutions with modified concentrations of Cl and HCO3. Removal of Cl and HCO3 reduced Cl efflux. Addition of HCO3 at typical seawater concentrations stimulated Cl efflux, independent of changes in the transepithelial potential. This active, HCO3‐stimulated Cl efflux is saturable, with a Km of 2.4 mM, typical of the concentration of HCO3 found in sea water, and independent of external pH. Active extrusion of Cl offsets the net diffusional and oral gain of Cl faced by O. beta in sea water.This publication has 12 references indexed in Scilit:
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