Where in the digestive tract sugar is broken down into what

First, starch is broken down into maltose by salivary amylase in the mouth.

It is then broken down into glucose by pancreatic and intestinal juices in the small intestine.

It is the epithelial villi cells of the small intestine that absorb glucose.

The order of the structure that passes after absorption is:Inferior vena cava - right ventricle - pulmonary artery -Aorta

The main absorptive organ of the human body is the small intestine, which absorbs nutrients into the blood or lymph through the mucosa of the upper layer of the small intestine. The main digestive organ of the human body is also the small intestine, but the digestion of sugars goes through more pathways, but the main digestive place should be the stomach, because the sugars to be digested are mainly starch, and starch is mainly digested by salivary amylase, and the digestion of starch is not only carried out in the mouth, but also mainly in the stomach, salivary amylase can still play a role near the naHCO3 barrier in the stomach, digesting 70% of the starch, of course, the small intestine because it has the largest variety and number of digestive juices, Therefore, it also plays an important role in the digestion of sugars, and the role of the stomach should be comparable.

Sugars are the starting point of carbohydrate digestion in our mouth, into our stomach, and finally in our colon, where they are finally broken down into hydrogen, methane, carbon dioxide and short-chain fatty acids.

The final site of glucose production and absorption in the digestive tract is the small intestine.

After glucose is absorbed, it is transported through the blood circulation to the tissue cells in the following order:

It is absorbed in the upper part of the small intestine and converted into glycogen by the liver for storage. Starch and glycogen in food are digested into simple sugars (glucose), galactose and fructose, which are absorbed in the intestine and then enter the bloodstream mainly through the capillaries and a small part into the lymph.

After the food enters the digestive tract, the salivary amylase in the oral cavity can decompose part of the starch into maltose, the gastric juice in the stomach contains the enzyme that preliminarily digests the protein, the pancreatic juice and intestinal fluid in the small intestine contain the enzyme that digests sugar, fat and protein, and the bile secreted by the liver also enters the small intestine.

Starch: Oral cavity.

Protein: stomach.

Fat: small intestine.

Starch is digested under the action of salivary amylase.

When starch and wheat tooth sugar reach the small intestine, they are further broken down into glucose because the pancreatic and intestinal juices in the small intestine contain digestive enzymes that digest them.

The digestion of protein starts in the stomach. When the egg in the food enters the stomach, it is initially digested under the action of gastric juice and then enters the small intestine. The pancreatic juice and intestinal fluid in the small intestine also contain enzymes that digest proteins, and the proteins that enter the small intestine are further broken down into amino acids.

1.The glucose decomposition pathway bai, the stage of converting glucose to acetone zhioic acid, is a common process of aerobic oxidation of sugar and sugar DAO digestion, and this metabolic process is called sugar.

Answer: Pathway of Digestion. The glycolytic pathway occurs in the intracellular fluid and can be divided into two stages: glucose to 2-molecule triose phosphate; Triose phosphate is converted to pyruvate.

When oxygen ** is insufficient, pyruvate produced by the glycolysis pathway is catalyzed by lactate dehydrogenase, which is reduced to lactic acid by Nadh+H+ hydrogen supply. The process by which glucose is converted to lactic acid in the absence of oxygen is called glycolysis.

2.The main process of glycolysis is the phosphorylation of glucose into glucose-6-phosphate, which is converted to fructose l,6-bisphosphate, which is decomposed into glyceraldehyde 3-phosphate, which is metabolized into pyruvate, which can be reduced to lactate under the action of lactate dehydrogenase.

3.The glycolytic pathway has three reactions that are essentially unidirectional and irreversible, and the three reactions are catalyzed by hexokinase (or glucokinase-phosphofructokinase-1 and pyruvate kinase, which are key enzymes in the glycolysis process.

Hello dear, there are two aspects of the physiological process through which sugars enter the cells from the digestive tract and are utilized, and sugar metabolism can be divided into two aspects: catabolism and anabolism, and the basic process of sugar metabolism in living organisms is similar. Catabolism of sugar refers to the process by which sugars are broken down into small molecule sensitive substances. After a series of decomposition reactions in the organism, sugar releases a large amount of energy for the body's vital activities.

At the same time, some intermediate products of stove combustion are formed in the decomposition process, and can be used as raw materials for the synthesis of biological macromolecular substances such as lipids, proteins, nucleic acids (as carbon frames). The catabolism of sugars can be divided into anaerobic metabolism and aerobic metabolism.

Among the various biomolecules, sugars are a very unique one. Sugars have a simple and homogeneous structure, so their metabolic pathways are much simpler. Therefore, glucose metabolism is at the heart of the overall metabolic network.

Glucose, galactose and fructose can be absorbed by small intestinal mucosal epithelial cells, and undigested disaccharides, oligosaccharides and polysaccharides cannot be absorbed, but can be decomposed by intestinal bacteria and released or metabolized in the form of CO2, methane, organic acids, etc. Butyric acid, which is produced by intestinal bacteria, is the main energy source for colon epithelial cells**. Recent studies have found that intestinal bacteria are involved in a variety of physiological and pathological processes in the human body, and are closely related to obesity, tumors, and autoimmune diseases.

Small molecule nutrients such as vitamins, water and inorganic salts can be directly absorbed and utilized by the human body, while macromolecular nutrients such as proteins, sugars and fats are insoluble in water and must be turned into small molecules in the digestive tract before they can be absorbed by the digestive tract wall

The process of breaking down food into nutrients that can be absorbed in the digestive tract is called digestion; Food is digested in both physical and chemical ways; The chewing of the teeth, the stirring of the tongue and the peristalsis of the stomach and intestines can fully mix food and digestive juices, which is physical digestion; Chemical digestion is the process of breaking down various nutrients in food into nutrients that can be absorbed through the action of various digestive enzymes

So the answer is: sugars; Protein; Fat; Digestion.