00:01
Hello everyone, in this question we have been asked to describe the absorption of nutrients in the small intestine and what is the nature of the absorbed compounds and how do they differ from the starting materials and how are they absorbed and what is their destination.
00:18
So basically the major digestion as well as absorption takes place in the small intestine.
00:25
From the stomach it reaches the small intestine and the small intestine also gets the secretion from liver and pancreas as the bile salts and pancreatic juice respectively.
00:44
So the proteins, peptones and proteases, these are further broken down into dipeptides by the enzyme that is trypsin or chymotrypsin or carboxypeptide.
01:08
Then the polysaccharides are broken down into the disaccharides with the help of the enzyme that is amylase.
01:18
So 30 % of the polysaccharide is already broken down into the oral cavity and rest of the 70 % are broken down here.
01:27
The fats are broken down by the lipases into the diglycerides.
01:35
So here the bile salts help in activation of the lipases and then monoglycerides are formed.
01:45
The nucleic acids are further broken down into the nucleotides and then into nucleosides by the enzyme nucleases.
01:57
So the enzymes in the succus entericus act on the end products of these above reactions to form the simplest absorbable form and the final step in digestion occurs very close to the mucosal epithelial of the intestine.
02:15
So now the dipeptides are further broken down into the absorbable form that is the amino acid by dipeptidases and the maltose is broken down by maltase into the glucose plus glucose that is the simplest form...