Question

The three secretions meeting the food in small intestine are
A. Bile juice, pancreatic juice and intestinal juice.
B. Pancreatic, intestinal and gastric juice.
C. Bile, pancreatic and gastric juice.
D. Bile, gastric juice and saliva.

Answer 1

The small intestine or small bowel is an organ in the gastrointestinal tract where most of the absorption of nutrients and minerals from food takes place. It is between the stomach and the large intestine. It receives bile and pancreatic juice through the pancreatic duct.

Step by step answer: Food is breakdown into small particles with the help of teeth and it gets mixed with the saliva in the mouth to make a proper bolus which is further passed to the stomach.
In the stomach, gastric juice acts on the food and covert it into chyme. The chyme is further passed on to the small intestine where a lot of small intestinal juices act and help in the absorption of the food.
In the small intestine, various types of movements are generated by the muscularis layer. This movement helps in mixing of the food properly and with various secretions in the intestine and therefore facilitates the digestion.
Secretions in the small intestine are:
1. The bile
2. Pancreatic juice
3. The intestinal juice
Hepato- pancreatic duct secretes the pancreatic juice and bile into the small intestine. The intestinal mucosal epithelium consists of goblet cells which secrete mucus. The secretions of the brush border cells of the mucosa along with the secretions of the goblet cells constitute the intestinal juice or succus entericus.
So, the correct option is option A. Bile juice, pancreatic juice, and intestinal juice.

Note: Pancreatic juice contain many inactive enzymes known as trypsinogen, chymotrypsinogen, procarboxypeptidase, amylase, lipases, nucleases. Trypsinogen is converted to trypsin with the help of an enzyme known as enterokinase.