Question

A young infant may be feeding entirely on mother's milk which is white in colour but the stools which the infant passes out are quite yellowish. The yellow colour of stool is due to
A) bile pigments passed through bile juice
B) undigested milk protein casein
C) pancreatic juice poured into duodenum
D) intestinal juice.

Answer 1

Hint:Bile comprises of ~95% water in which are broken up a number of endogenous constituents like bile salts, bilirubin phospholipid, cholesterol, amino acids, steroids, chemicals, porphyrins, vitamins, and many heavy metals, as well as exogenous drugs, xenobiotics and natural poisons.

Complete answer:
The yellow colour of the stools is because of the presence of bile salts. Bile colours are actually the excretory substances. The bile is a bitter-tasting, greenish-yellow in colour, an antacid fluid which is produced by the liver and temporarily stored in the gallbladder and is then discharged into the duodenum. It helps in emulsification of fats by the activity of bile salts, by decreasing the surface tension of fat droplets. These fat droplets afterwards are acted upon by lipase.

Additional information:
Bile contains bile acids, which are fundamental for fat emulsification and fat-soluble vitamins. There are a number of squandering materials like bilirubin which are egested from the body through the stomach related framework.

So, the correct answer is A.

Note:The gallstones can bile obstruct coming into the duodenum, this appears to form the stool turn into yellow. Numerous other differing gallbladder illnesses can cause the stool to alter yellow in colour.