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Animals such as fish and amphibians, which have constant access to water, have not suffered natural selection that led to more "water conservative" measures, and flush their nitrogenous waste primarily as ammonia.
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www.bio.miami.edu/dana/dox/nitrogenouswaste.html
www.bio.miami.edu/dana/dox/nitrogenouswaste.html
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Urine - Wikipedia, the free encyclopedia
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Urine is a liquid waste product of the body secreted by the kidneys by a process of filtration from blood called urination and excreted through the urethra. Cellular metabolism generates numerous was...
en.wikipedia.org/wiki/Urine
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Hutchinson encyclopedia article about Nitrogenous waste. Nitrogenous waste. Information about Nitrogenous waste in the Hutchinson encyclopedia. ... (redirected from Nitrogenous waste)
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encyclopedia.farlex.com/Nitrogenous+waste
encyclopedia.farlex.com/Nitrogenous+waste
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While the major portion of human nitrogenous waste is in the form of urea, humans typically excrete some uric acid, too. Uric acid is another kind of purine like the adenine and guanine in our DNA (structure to the right).
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biology.clc.uc.edu/courses/Bio105/kidney.htm
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In the past 50 years, it has become clear that the branchial epithelium is the primary site of transport processes that counter the effects of osmotic and ionic gradients, as well as the principal site of body fluid pH regulation and nitrogenous waste excretion.
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physrev.physiology.org/cgi/content/full/85/1/97
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The fish gill is a multipurpose organ that, in addition to providing for aquatic gas exchange, plays dominant roles in osmotic and ionic regulation, acid-base regulation, and excretion of nitrogenous wastes.
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physrev.physiology.org/cgi/content/abstract/85/1/97
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However, the principal form of nitrogenous waste product in the urine of an animal may vary, depending on environmental conditions. ... Protein intake did not influence nitrogenous waste product concentrations in ureteral urine. However, when protein intake was reduced, the proportion of ammonia in excreted fluid was...
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jeb.biologists.org/cgi/content/full/205/12/1735
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Protein is used as a metabolic fuel by fish, although its quantitative importance remains somewhat controversial (reviewed by Wood, 2001 ). Regardless, the consequence of protein oxidation is the production of nitrogenous waste, which is excreted predominantly as ammonia together with a small amount of urea in...
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jeb.biologists.org/cgi/content/full/207/12/1993
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