SOMEONE PLEASE HELP ME THIS IS DUE TONIGHT!!!! Excretion of nitrogen-containing wastes is a problem for animals because nitrogen-containing waste products can be toxic to cells. Three different I mechanisms have evolved in animals for removal of nitrogenous waste:
• ammonotelism: excretion of ammonia
• ammonotelism: excretion of ammonia
• ureotelism: excretion of urea . uricotelism: excretion of uric acid
The least energy-consuming mechanism is ammonotelism, or ammonia excretion. However, ammonia is highly toxic to animal cells and must be eliminated quickly to preserve cell integrity. Urea is lesstoxic to cells than ammonia, but producing it requires more energy expenditure than producing ammonia. Production of uric acid is the most energy consumptive of the three, but uric acid is the least toxic of the three waste forms. Cells can be exposed to uric acid for long periods of time without harm
In addition, ammonia and urea are highly soluble in water. Dilution of these compounds reduces their toxicity and can help to move them quickly away from cells. Uric acid is insoluble in water and tends to precipitate out as a semi-solid when it builds up in some quantity.
1. The data in the table below show the results of chemical analysis of animal excrement for compounds containing nitrogen. The quantities listed in the table reflect the percentage of the total nitrogen in the form of ammonia, urea, and uric acid. Analyze the data and describe the relationship between the type of excretion and the type of organism and its environment
2. The type of excretion mechanism used by an animal reflects a balance among the amount of energy needed to produce the waste, the toxicity of the waste, and the availability of water in the animal’s environment that could be used to flush the waste away. Propose an explanation for the observed excretion mechanisms in turtles, tortoises, and snakes that takes into account the toxicity, water solubility, and energy requirements related to each mechanism
