Nitrogenous wastes tend to form toxic ammonia, which raises the pH of body fluids. The formation of ammonia itself requires energy in the form of ATP and large quantities of water to dilute it out of a biological system. Animals that secrete urea as the primary nitrogenous waste material are called ureotelic animals.
What are the forms of nitrogenous waste excreted by different species?
Figure 22.13. Nitrogenous waste is excreted in different forms by different species. These include (a) ammonia, (b) urea, and (c) uric acid. (credit a: modification of work by Eric Engbretson, USFWS; credit b: modification of work by B. “Moose” Peterson, USFWS; credit c: modification of work by Dave Menke, USFWS)
What is the suffix for unsaturated nitrogen 3-membered heterocycles?
• Unsaturated nitrogen 3-membered heterocycles may use the traditional “irine” suffix. • Consistent use of “etine” and “oline” as a suffix for 4 & 5-membered unsaturated heterocycles is prevented by their former use for similar sized nitrogen heterocycles.
What is nitrogenous waste in birds and reptiles?
Nitrogenous Waste in Birds and Reptiles: Uric Acid. Mammals also form some uric acid during breakdown of nucleic acids. Uric acid is a compound similar to purines found in nucleic acids. It is water insoluble and tends to form a white paste or powder; it is excreted by birds, insects, and reptiles.
What is a nitrogenous waste in a cell?
For organisms like us that can’t produce their own energy, our cells often convert energy from proteins. As the amino acids within proteins are broken apart, they leave behind a few atoms the cell can’t use, which come together to form a nitrogenous waste, a nitrogen-based waste product. There are three main kinds.
What is the third major form of nitrogenous waste?
The third major form of nitrogenous waste is uric acid, a nitrogenous molecule with four nitrogen atoms. This is the most complex of the common nitrogenous wastes and requires the most energy for a cell to produce, but it also gets the most nitrogen out of the body, is not toxic, and requires very little water to get it out of the body.
