AP BIOLOGY

Detailed explanation-1: -The liver produces several chemicals (enzymes) that change ammonia into a form called urea, which the body can remove in the urine.

Detailed explanation-2: -Urea is produced in the liver and is a metabolite (breakdown product) of amino acids. Ammonium ions are formed in the breakdown of amino acids. Some are used in the biosynthesis of nitrogen compounds. Excess ammonium ions are converted to urea.

Detailed explanation-3: -The extra proteins in the body are degraded by the process of deamination where the NH2 group is removed and it is converted into ammonium ions in the liver. The ammonium ions enter urea cycle and get converted into urea. The urea formed in liver is transported to kidney through circulation and finally gets excreted.

Detailed explanation-4: -Urea produced by the liver is then released into the bloodstream, where it travels to the kidneys and is ultimately excreted in urine.

Detailed explanation-5: -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.