Abstract
THE enigmatic secretion of gas into the teleostean swim-bladder has been attributed to the acidification of the blood bathing the gas gland epithelium1. The resultant local changes of pH, pCO2 and pO2 are thought to be sequestered from the rest of the circulation by counter-current exchange in the rete mirabile. This has been the only credible explanation; but its acceptance has rested upon its credibility. Even though the isolated gas gland epithelium actively converts glucose to lactic acid2, there has been no evidence, either in vivo or in vitro, for an oriented hydrogen-ion extrusion into the solution bathing the serosal surface of the epithelium, the surface normally bathed by blood.
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References
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HOGBEN, C. The Teleostean Swim-bladder. Nature 182, 1622 (1958). https://doi.org/10.1038/1821622a0
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DOI: https://doi.org/10.1038/1821622a0
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