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Discuss the role of various enzymes during digestion in humans
Answers
Various glands are associated with alimentary canal serving the process of digestion of food. These are as follows:
1》Salivary glands - These glands are of three types and secrete saliva containing an enzyme called salivary amylase.
It converts starch into sugar at an optimum pH of about 7.
It's due to the salivary gland that our mouth waters when we eat or smell something we like.
2》Gastric glands - These are found in the wall of stomach.
The gastric glands release digestive juice containing HCL, pepsin ,mucus,etc.
Hydrochloric acid kills the bacteria ingested with food.
It creates an acidic medium of PH about 2, facilitating the action of pepsin enzyme.
It acts on proteins present in food.
Due to this highly acidic nature of HCL the digestion in stomach is prevented.
It also prepare the engine street food for further processing in the small intestine.
The mucus protects the lining of the stomach from the action of hydrochloric acid produced under normal conditions.
3》Liver : It is known as the largest gland of the body which secretes bile juice.
This juices act on large fat molecules to form small globules increasing the efficiency of enzyme action.
Gall bladder stores bile juices for the further use.
4》Intestinal glands - Walls of small intestine contain numerous glands that secrete intestinal juice containing Amylolytic, proteolytic and lipolytic enzymes.
5》Pancreas - It secretes pancreatic juice which contains enzymes like amylase, trypsin and lipase.
It is connected to the small intestine through its main duct called pancreatic duct.