Question

A man has taken a large amount of protein in his diet. He will excrete more of
A. Urea
B. Uric acid
C. Sugar
D. Salt and water.

Answer 1

Hint: The system which is involved in the elimination of body waste products in form of liquid to sustain the internal body homeostasis is called the excretory system. The excretory systems of the human include, urinary system, integumentary system, respiratory system, gastrointestinal tract, and biliary system.

Complete answer:
The biological cycle which involves the excretion of nitrogen in form of urea is called the urea cycle. Generated urea is eliminated out of the body by urine. Liver cells are responsible for the formation of the urea from the nitrogenous waste.
In the given question, the man has taken a high amount of protein in his diet. This leads him to the excretion of more urea. The protein that is taken by the person first undergoes the destination process which is taking place in the liver cell. Deamination of protein results in the elimination of amino groups and form the ammonia. Ammonia is used in the urea cycle to form the urea. Formation of urea includes 5 Stages these are carbamoyl phosphate synthesis, Synthesis of citrulline, argininosuccinate synthesis, the formation of arginine, cleavage of arginine, and production of urea.

So, the correct answer is option A. Urea.

Note: Urea is composed of two $N{H_2}$ groups and a carbonyl group. The Carbonyl group is responsible for joining the two $N{H_2}$ groups. Ammonia is a very toxic element that can damage the cell if accumulated. To protect the body from the toxicity of the ammonia, liver cells convert the ammonia to a less toxic nitrogenous waste called urea. Urea is soluble in water thus excrete out from the body in form of urine.