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The secretions released into the small intestine include
Option: 1
Bile
Option: 2
Pancreatic juice
Option: 3
Intestinal juice
Option: 4
All of the above
Answers (1)
- Various types of movements are generated by the muscularis layer of the small intestine.
- These movements help in a thorough mixing of the food with various secretions in the intestine and thereby facilitate digestion.
- The bile, pancreatic juice and 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, procarboxypeptidase, amylases, lipases and nucleases.
- Trypsinogen is activated by an enzyme, enterokinase, secreted by the intestinal mucosa into active trypsin, which in turn activates the other enzymes in the pancreatic juice.
- The bile released into the duodenum contains bile pigments (bilirubin and biliverdin), bile salts, cholesterol and phospholipids but no enzymes.
- Bile helps in emulsification of fats, i.e., breaking down of the fats into very small micelles.
- Bile also activates lipases.
The bile, pancreatic juice and intestinal juice are the secretions released into the small intestine. Hence, the correct answer is option d.
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