Ammonia excretion in the freshwater planarian Schmidtea mediterranea.

  title={Ammonia excretion in the freshwater planarian Schmidtea mediterranea.},
  author={Dirk Weihrauch and Ainsely C Chan and Heiko Meyer and Carmen Doering and Mary M Sourial and Michael J O'Donnell},
  journal={The Journal of experimental biology},
  volume={215 Pt 18},
In aquatic invertebrates, metabolic nitrogenous waste is excreted predominately as ammonia. Very little is known, however, of the underlying mechanisms of ammonia excretion, particularly in freshwater species. Our results indicate that in the non-parasitic freshwater planarian Schmidtea mediterranea, ammonia excretion depends on acidification of the apical unstirred layer of the body surface and consequent ammonia trapping. Buffering of the environment to a pH of 7 or higher decreased the… CONTINUE READING

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