Urea and amphibian water economy.

  title={Urea and amphibian water economy.},
  author={Cecilie B J\orgensen},
  journal={Comparative biochemistry and physiology. Part A, Physiology},
  volume={117 2},
Accumulation of urea in the body fluids enables some amphibians to tolerate high ambient salinities (Bufo viridis, Xenopus laevis, Rana cancrivora, Ambystoma tigrinum, Batrachoseps spp.) or to estivate in soil with low water potentials (Scaphiopus spp.). These species are assumed not only to accumulate urea produced in the normal metabolism, but to synthesize urea in response to water shortage. Re-examination of the data did not support the view of an osmoregulatory urea synthesis. Increased… CONTINUE READING

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