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Topic: **Homework assist****Question:**
its due on Monday, and I really need help with it, I've managed to do some, but I'm stuck on the rest. Any help would be appreciated. Thanks!
1) How does the excretion of nitrogenous waste as uric acid assist the budgerigar to maintain water balance in arid regions?
5) Identify the net water movement (gain or loss) by osmosis in fish in: freshwater and salt water.
9) Describe problems of maintaining water balance for: a freshwater fish and seawater fish.

April 19, 2019 / By Delilah

1) uric acid does not require the excretion of much water to dilute the waste. If the organism excreted urea, more water would have to be used and in an arid region water is difficult to find. Hence, it helps the organism retain water thus maintaining homeostasis. 5) This one is easy. Osmosis is movement of water from an area of high concentration to one of lower concentration. Freshwater will have a higher concentration of water (lower concentration of solute or salt) than the fish. Hence, the net movement of water will be into the fish. The opposite is true in salt water. 9) Not sure how much detail your professor wants on this one. The last answer will help you understand the problem though. The freshwater fish has trouble expelling all the water as he is receiving a higher concentration of water than is optimum for his body. The opposite is true of seawater fish.

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