Respuesta :
Answer:
The digestion of these three types of food is very different despite the fact that they are metabolized by the same pathways or organs, since carbohydrates are absorbed throughout the gastro-intestinal tract, lipids are absorbed at the intestinal level due to their complexity molecular and if it is water-repellent (that is why they are treated as micelles) and finally the proteins are absorbed at the intestinal level in a simplified way as amino acids, which these amino acids do not meet a single metabolic pathway, part of them are used to the urea cycle that is considered very important for our body.
Explanation:
Once ingested, lipids become triglycerides thanks to the lingual lipase in the mouth, then they are emulsified by gastric juice, gastric lipase and hydrochloric acid. As the next step in the union between the stomach and the duodenum, it attacks the action of pancreatic lipase together with the cholesterol-hydrolyzed phospholipase, they pass to the jejunum in the form of fatty acid wrapped in micelle, meeting with the chylomicron, the chilmicron is in charge of absorbing it into the in order to take it to the blood and lymph, thus ensuring a fat reserve ... That which is not absorbed at the level of the chylomicron continues as waste in the faeces.
The proteins, once ingested, are only fractionated in the mouth so that the esophagus recognizes the macromolecules, in the stomach, pepsin and hydrochloric acid act, simplifying the structure and this happens thanks to the fact that the esophagus issues a warning about protein intake. In the stomach the protein is transformed into polypeptide that are attacked by trypsin, chymotrypsin and elastase that are secreted by the pancreas (cascade activation), then they are transformed into oligopeptides, they pass to the intestine being attacked by carboxypeptidases, aminopeptidases and dipeptidases so finally absorb the amino acids (it is important to clarify that part of the amino acids will form the urea, others will be for nutritional requirements, another for the energy cycle, etc.)
Carbohydrates begin to be digested in the mouth, by means of alpha amylase in saliva, where the macro structures of carbohydrates are broken, then continue to be digested in the stomach by hydrochloric acid, are metabolized by pancreatic amylase , following the thin intestine where they are absorbed as monosaccharides.
Answer:
Digestion is the breakdown of food substances into smaller units which will later be absorbed and used for the body metabolism.
When food is taken in, the carbohydrate is acted upon by salivary amylase and carbohydrate is broken down.
The food enters the stomach and the protein is acted upon by pepsin and dilute Hydrochloric acid to break it into smaller peptides.
The food(chyme)then enters into the small intestine through the duodenum. Before entering the small intestine the food is mixed with pancreatic juice from the pancreas and bile from the liver. The gall bladder stores the bile and mixes the food with it.
In the small intestine the pancreatic amylase, protease and lipase finally acts on carbohydrates, protein and fat and oil. Glucose, Amino acid and fatty acid is formed as the end product of the digestion of these three classes of food.
The large intestine absorbs and reabsorbs nutrient and they are channeled into the bloodstream through the villi.
The waste is expelled through the rectum.
