NEET PG DENTAL EXAM

Detailed explanation-1: -Essential and nonessential amino acids are interconvertible with body protein stores. Amino acids may also be metabolized through the liver to form urea, which is then excreted in the urine.

Detailed explanation-2: -Urea, commonly referred to as blood urea nitrogen (BUN) when measured in the blood, is a product of protein metabolism. BUN is considered a non-protein nitrogenous (NPN) waste product. Amino acids derived from the breakdown of protein are deaminated to produce ammonia.

Detailed explanation-3: -Urea is produced as a waste product by the breakdown of unused proteins in the liver. Our bodies must eliminate these waste materials because their accumulation is poisonous and harmful to us. In the form of urine, our kidneys excrete urea, waste salts, and excess water from the blood (a yellowish liquid).

Detailed explanation-4: -Respiratory system. The respiratory pathway is concerned principally with the gaseous waste products of metabolism (carbon dioxide and ammonia), which move to the external environment by diffusing from the cells of origin.