Question:

The principal nitrogenous excretory compound in humans is synthesised

Updated On: Jul 13, 2024

in kidneys but eliminated mostly through liver
in kidneys as well as eliminated by kidneys
in liver and also eliminated by the same through bile
in the liver, but eliminated mostly through kidneys.

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The Correct Option is D

Solution and Explanation

The principle nitrogenous excretory compound in humans is urea. Urea is produced in a series of reactions (urea cycle) which take place in the mitochondrial matrix and cytosol of liver cells. Urea cycle (ornithine cycle) is the series of biochemical reactions that converts ammonia, which is highly toxic, and carbon dioxide to the much less toxic urea during the excretion of metabolic nitrogen derived from the deamination of excess amino acids. The urea is ultimately excreted in solution in urine.

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Concepts Used:

Mechanism Human Excretory System

Excretory System Organs

Kidneys- Kidneys are bean-shaped structures located on either side of the backbone. In human each adult kidney size is 10-12 cm with a width of 5-7 cm and weighs around 120-170g and it have an inner concave structure.

Ureter - A pair of thin muscular tubes called the ureter. Ureter comes out of each kidney extending from the renal pelvis and it carries urine from the kidney to the urinary bladder.

Urinary Bladder - muscular sac-like structure which stores urine. The urinary bladder is emptied by the process of micturition.

Urethra- This tube comes out from the urinary bladder and helps to expel urine out of the body. It acts as the common route for sperms and urine in males.