00:01
Hi, in this answer we are going to compare the digestion and absorption of proteins, fats and carbohydrates.
00:10
So, digestion is a process where large molecules of food are broken down into smaller molecules.
00:20
Digestion are of two types namely mechanical digestion, chemical digestion.
00:27
So in mechanical digestion, there is a physical breakdown of food by the teeth where smaller molecules are produced from the larger molecules and in chemical digestion enzymes are involved which breaks the chemical bonds in the foot molecules so proteins are digested into amino acids fats are broken down into fatty acids and glycerol and carbohydrates are broken down into monosaccharides coming to the digestion of carbohydrates so the digestion of carbohydrates starts in the mouth where the salivary amylase acts upon the carbohydrates and breaks it down into polysaccharides and disaccharides.
01:17
From the mouth it moves to the stomach and from the stomach it moves on to the diodenum where the pancreatic amelase acts on the polysaccharides and converts it into disaccharides.
01:35
The dis -saccharides are acted upon by the enzymes di -saccharidases in the epithelium of the small intestine and they are broken down into monosaccharides.
01:59
Coming to digestion of lipids, the bile salts which are produced by the liver and the pancreatic lipase act on the lipids and it is broken down into fatty acids and.
02:17
And monoglyzerides.
02:22
Coming to proteins, the proteins are acted upon by the enzyme called as pepsin, which breaks it down into polypeptides.
02:34
It is acted upon by the enzymes such as tripsin, chymotripsin etc.
02:45
In the pancreas and it is converted into peptides which is acted upon by peptidases and is broken down into amino acids.
03:05
Coming to absorption of the various nutrients, absorption of carbohydrates takes place via symport with sodium ions...