Diffusion of chloride ions in the mucus on the oesophagus of Enophrys bison, a marine teleost fish
Shepard, K.L.
Pflugers Archiv European Journal of Physiology 402(2): 207-210
1984
ISSN/ISBN: 0031-6768 PMID: 6527940 Document Number: 238590
Microelectrodes sensitive to Cl- were used to estimate the diffusion coefficient for Cl- in the mucus on the esophagus of a marine teleost fish, Enophrys bison. The estimate was 0.231 .times. 10-5 cm2/s. This value is significantly less than the value in saline or in seawater. The technique was based on a simple interpretation of Ficks 1st law. The flux of Cl- across an isolated everted preparation of esophagus was compared to the concentration gradient of Cl- within the mucous layer and its thickness and the surface area of the preparation available to diffusion.