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Ch. 44 - Osmoregulation and Excretion
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All textbooksCampbell 11th EditionCh. 44 - Osmoregulation and ExcretionProblem 3

Chapter 44, Problem 3

Which of the following animals generally has the lowest volume of urine production? a. vampire bat b. salmon in fresh water c. marine bony fish d. freshwater flatworm

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Hello everyone here we have a question asking which of the following conditions reduce urine output in marine bony fish. A high platonic environment. This would increase urine output instead of a high platonic environment. They live in a hyper tonic environment meaning the concentration of salt is higher in the water compared to their body fluids. Be osmotic water gain through gills and skin. This would also increase urine output because they would be gaining water in their body. See osmotic water lost through gills and skin. This is going to reduce their urine output because they live in a hyper tonic environment. They're going to lose water through their gills and skin and reduce urine output and D. Is incorrect because A. And B. Are incorrect. So our answer is C. Osmotic water lost through gills and skin. Thank you for watching. Bye.
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African lungfish, which are often found in small stagnant pools of fresh water, produce urea as a nitrogenous waste. What is the advantage of this adaptation? a. Urea takes less energy to synthesize than ammonia. b. Small stagnant pools do not provide enough water to dilute ammonia, which is toxic. c. Urea forms an insoluble precipitate. d. Urea makes lungfish tissue hypoosmotic to the pool.

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