ISSN:
1432-136X
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Medicine
Notes:
Summary 1. The structure of mucus in the oesophagus of the sea-water adapted eel, consists of a framework of fibers decreasing in density and thickness from the anterior to the posterior oesophagus. 2. With seawater in the lumen the mucus layer supports, in vitro, about 45% of the lumen to serosa gradient of sodium ion activity along the whole oesophagus. It supports different chloride ion activity gradients: about 80% in the anterior and about 45% in the middle and posterior oesophagus. These results are confirmed by X-ray micro-analysis. 3. Experiments without lumen-to-serosa gradients demonstrate a linked sodium and chloride active absorption appearing in the middle oesophagus and increasing towards the posterior oesophagus. 4. Na+−K+-ATPase is cytochemically demon-strated but could not be inhibited by ouabaïn during in vitro experiments, due to its particular localization.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00692363
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