Question

In humans, bile juice is secreted by
A. Pancreas
B. Small intestine
C. Oesophagus
D. Liver

Answer 1

Hint: Various sorts of movements are generated by the muscularis layer of the tiny intestine. These movements help during a thorough mixing from the food with various secretions within the intestine and thereby facilitate digestion.

Complete Answer:
The bile, digestive juice and therefore the secretion are the secretions released into the tiny intestine digestive juice and the bile are released through the hepato-pancreatic duct.
The bile released into the duodenum contains bile pigments (bilirubin and biliverdin), bile salts (sodium bicarbonate, sodium glycocholate, sodium taurocholate, cholesterol and phospholipids). Bile has no enzyme. Bile helps in emulsification of fats, i.e., breaking down of the fats into very small micelles (a combination of fatty acids, monoacylglycerols and bile salts). Bile also activates lipases.

Now allow us to gather information about given options :
A. Pancreas: The exocrine part of the pancreas secretes an alkaline digestive juice containing various enzymes while its endocrine part secretes hormones, insulin and glucagon. Pancreas has two ducts within it.
B. Intestine: The wall of the intestine has thin layers of longitudinal and circular muscles. Mucosa has folds called plicae circulare (folds of Kerckring or Valvulae conniventes) and villi towards the lumen of the intestine. Epithelial cells that are present in the villi have microvilli which further increase the absorptive area.
C. Oesophagus: The oesophagus may be a thin, long tube which extends posteriorly passing through the neck, thorax and diaphragm and results in a J-shaped bag-like structure called stomach. The opening of oesophagus into the stomach is regulated by a muscular (gastro-oesophageal) sphincter.
D. Liver: Hepatic cells secrete bile and transported to the gallbladder through hepatic ducts. Gall bladder may be a thin muscular sac featuring a capacity of 30 to 50 ml. Here (gallbladder), the bile is stored and concentrated. The ducts of gallbladder (cystic duct) alongside the duct from the liver, forms the common bile duct .

Hence the correct answer is option is D that's liver.

Note: Bile helps within the digestion of lipid content. It also increases the absorption of fat and fat soluble substances like vitamin A , D, E and K. It doesn't contain any digestive enzymes. Bile juice helps in breaking down large fat molecules into smaller ones which makes it further easy for the pancreatic enzymes to hold out their function.