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Urea and ammonia excretion by solitary ascidians

✍ Scribed by John A. Markus; Charles C. Lambert


Book ID
115966505
Publisher
Elsevier Science
Year
1983
Tongue
English
Weight
822 KB
Volume
66
Category
Article
ISSN
0022-0981

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## Abstract In fresh water fishes, ammonia is excreted across the branchial epithelium via passive NH~3~ diffusion. This NH~3~ is subsequently trapped as NH in an acidic unstirred boundary layer lying next to the gill, which maintains the blood‐to‐gill water NH~3~ partial pressure gradient. Whole a