write a short notes on small intestine
Answers
Answer:
Digestion in small intestine
- The bile, pancreatic juice and the intestinal juice are the secretions released into the small intestine.
- Pancreatic juice and bile are released through the hepato-pancreatic duct.
- The pancreatic juice contains inactive enzymes:
- trypsinogen
- chymotrypsinogen
- procarboxypeptidases
- amylases
- lipases
- Trypsinogen is activated by an enzyme, enterokinase, secreted by the intestinal mucosa into active trypsin.
- The bile released into the duodenum contains bile pigments (bilirubin and bili-verdin), bile salts, cholesterol and phospholipids.
Bile helps in emulsification of fats and also activates lipases.
The intestinal mucosal epithelium has 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 succus entericus.
The mucus along with the bicarbonates and Brunner’s glands from the pancreas protects the intestinal mucosa from acid as well as provide an alkaline medium.
Proteins, proteoses and peptones in the chyme reaching the intestine are acted upon by the proteolytic enzymes of pancreatic juice
Answer:
small intestine is very important for digestion and it is the place where juices or enzymes released by pancreas liver etc. meet with food which we had then glucose molecules are separated and diluted in our blood