Question

In human,the digestion of carbohydrates,protein and fats are completed in the small intestine.Discuss.

Answer 1

In human,the digestion of carbohydrates,protein and fats are completed in the small intestine :

• Carbohydrates are degraded into simple sugars. Some carbohydrates, such as cellulose, are not digested at all, despite being made of multiple glucose units. This is because the cellulose is made out of beta-glucose, making the inter-monosaccharidal bindings different from the ones present in starch, which consists of alpha-glucose. Humans lack the enzyme for splitting the beta-glucose-bonds, something reserved for herbivores and bacteria from the large intestine

• Proteins are degraded into small peptides and amino acids before absorption. Chemical breakdown begins in the stomach and continues in the small intestine. Proteolytic enzymes, including trypsin and chymotrypsin, are secreted by the pancreas and cleave proteins into smaller peptides. Carboxypeptidase, which is a pancreatic brush border enzyme, splits one amino acid at a time. Aminopeptidase and dipeptidase free the end amino acid products.

• Lipids (fats) are degraded into fatty acids and glycerol. Pancreatic lipase breaks down triglycerides into free fatty acids and monoglycerides. Pancreatic lipase works with the help of the salts from the bile secreted by the liver and the gall bladder. Bile salts attach to triglycerides to help emulsify them, which aids access by pancreatic lipase. This occurs because the lipase is water-soluble but the fatty triglycerides are hydrophobic and tend to orient towards each other and away from the watery intestinal surroundings. The bile salts emulsify the triglycerides in the watery surroundings until the lipase can break them into the smaller components that are able to enter the villi for absorption.

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Answer 2

Human Digestion

Explanation:

Carbohydrates-

• The objective of sugar processing is to separate all disaccharides and complex starches into monosaccharides for assimilation, despite the fact that not all are totally invested in the small digestive tract (e.g., fiber).
• Absorption starts in the mouth with salivary amylase discharged during the way toward biting.  

Protein-

• Protein assimilation happens in the stomach and duodenum wherein 3 primary compounds, pepsin emitted by the stomach and trypsin and chymotrypsin discharged by the pancreas, separate nourishment proteins into polypeptides that are then separated by different exopeptidases and dipeptidases into amino acids.  

fats-

• Most synthetic processing happens in the duodenum by synthetics discharged by the liver, pancreas and small digestive tract.
• The other two segments of the small digestive tract, the jejunum and the ileum, retain nourishment particles by method for the villi legitimately into the circulatory system.