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Why do mammals convert ammonia to urea rather than simply excreting it, as fish do?
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- On the basis of the type of nitrogenous end product, there are three modes of excretion in animals. These are ammonotelism, ureotelism, and uricotelism. Explain.Production of any sort of nitrogenous waste other than ammonia costs energy. Name at least three distinctly different advantages an animal might gain by investing in production of urea or uric acid.African lungfish, which are often found in small stagnant poolsof fresh water, produce urea as a nitrogenous waste. What is theadvantage of this adaptation?(A) Urea takes less energy to synthesize than ammonia.(B) Small stagnant pools do not provide enough water to diluteammonia, which is toxic.(C) Urea forms an insoluble precipitate.(D) Urea makes lungfish tissue hypoosmotic to the poo
- What species excrete excess nitrogen as ammonia? Which ones excrete it as uric acid?explain why some desert animals excrete uric acid rather than ammoniaWhich molecules are responsible for the high osmolarity of the renal medulla in the mammalian kidney? "Na+, Cl-, and K+" "urea, uric acid, and Na+" "Na+, Cl-, and urea" "uric acid, urea, and amonia"
- Why is ammonia not used as a nitrogenous waste compound in terrestrial animals? a)Ammonia is highly toxic, and to minimize that toxicity it must be excreted in large volumes of water. b)Urea and uric acid both have more nitrogen atoms than ammonia, making them more efficient at c)Ammonia is used by reptiles and birds, because it is less toxic to developing embryos than urea. d)Ammonia has more free energy than urea, so ammonia waste is converted to urea to capture some of that free energy.Some animals living in a fluid medium excrete nitrogen asammonia. Land animals, which conserve water, excrete ureaand uric acid. Why does the excretion of these molecules aidin water conservation?Some animals living in water excrete nitrogen as ammonia. Land animals, which must conserve water, excrete urea or uric acid. How does excretion of these molecules aid in water conservation?
- Ammonia, NH3, and ammonium ion, NH4+, are both soluble in water and could be easily excreted in the urine. Why does the body convert them to urea rather than excreting them directly?How does ammonia get processed by the kidneys?Why are the loop of Henle and vasa recta important for the formation of concentrated urine?