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Biol Bull 70: 228-235. (April 1936)
© 1936 Marine Biological Laboratory
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RENAL FUNCTION IN MARINE TELEOSTS

III. THE EXCRETION OF UREA

ALLAN L. GRAFFLIN 1

1 From the Department of Anatomy, Harvard Medical School

Data upon plasma and urinary urea at varying rates of urine flow are presented for the sculpin and flounder. In addition, a few figures are reported for the daddy sculpin, sea raven, and wrymouth. From a comparison of the present data with those of Clarke (1934), glomerular filtration alone seems adequate to account for all of the urea excreted by the sculpin. Furthermore, urea may apparently be reabsorbed by the renal tubules in considerable amounts, particularly in the lower, more normal range of urine flow. In the aglomerular goosefish, in the plasma and urine of which urea is normally present in only minimal amounts, injected urea appears in the urine in significantly higher concentration than is present in the plasma.






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Copyright © 1936 by the Marine Biological Laboratory.