Question

The body has an interesting way of using deriving uses from waste material prior to its disposal. For example, carbon dioxide is a waste product of cellular respiration, and is disposed of through the lungs. However, prior to its removal, it is the source of one of the most important buffer systems in the body—the carbonic acid/bicarbonate buffer system. Identify and describe two other waste products in the body that have a critical role in body function. And no, removal of toxins from the body—or any related function—does not count; the waste product in question (or what it can turn into) must have some actual positive effect on the body prior to its disposal.

Answer 1

Urea : The cycling of and excretion of urea by the kidneys is a vital part of the mammalian metabolism. Besides its role as carrier of waste nitrogen, urea also plays a role in the countercurrent exchange system of the nephrons, that allows for re-absorption of water and critical ions from the excreted urine.

Creatinine : Creatinine is a chemical waste product in the blood that passes through the kidneys to be filtered and eliminated in urine. It aids in the normal muscle function.

Ammonia : It is a chemical made by bacteria in intestines and your body's cells while you process protein. body treats ammonia as a waste product, and gets rid of it through the liver. It can be added to other chemicals to form an amino acid called glutamine before excretion which is  an energy source for intestinal and immune cells. It also helps maintain the barrier between the intestines and the rest of your body and aids with proper growth of intestinal cells.