Bile does not contain digestive enzymes why it digests fats

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The liver secretes bile. Bile does not contain digestive enzymes and is a mixture of bile salts, bile pigments and cholesterol. Its effect is mainly manifested in the action of bile salts:

Emulsifies fats and promotes fat digestion; Promote the absorption of fatty acids and fat-soluble vitamins; Prevents cholesterol deposits. Cholesterol deposition is one of the causes of gallstone formation. Bile pigments and cholesterol have little effect on digestion.

Bile salts are polar molecules, one end is a hydrophilic hydroxyl group, the other end is a lipophilic sterol compound, the fat droplets in the intestine are surrounded by bile salt molecules, the lipophilic end of the bile salt molecule is bound to the lipid molecule, and the hydrophilic end is exposed to the aqueous solution in the intestinal tract. In this way, the fat droplets are isolated from each other and do not merge into large clumps, forming water-soluble droplets, which is the emulsification of bile, that is, the effect of bile salts on the digestion of fat.

The small intestine cannot digest fats. After fat emulsification, part of it is broken down into glycerol and fatty acids by lipase and absorbed by intestinal wall cells. The rest is not digested, or only one or two fatty acids fall off to become glycerides or glycerides.

The fatty acids produced by digestion are also polar molecules, and they can also combine with fats, glycerides, and glycerides to form small water-soluble clumps. These small clumps can continue to be digested or enter the cells directly through endocytosis (pinocytosis) by the cells of the intestinal wall. In cells, glycerol and fatty acids combine to form fats, which are transported from the lymphatic vessels (milk ducts) in the intestines along with the fat that goes directly into the cells.

Glycerol, fatty acids, and short-chain fat molecules can also enter the blood vessels.

Hope it helps.

Although bile does not contain digestive enzymes, it does contain bile acids, whose function is to help the digestion and absorption of fats in the body.

I guess that's how it should be :

From the mouth into the esophagus, it enters the initial digestion, and then there is the absorption of the liver, which has an important significance for fat.

Bile deficiency does not contain digestive enzymes, and its main role is to promote the digestion and absorption of pretending to be deficient in fat.

a.Correct arguments.

b.Mistake. Correct Answer: a

The liver is the largest deficiency roughening gland in the human body, which can secrete bile The bile secreted does not contain digestive enzymes, which emulsify fat and carry out physical volcanic digestion

So the answer is:

Fat PS: The role of bile is mainly that of bile salts or bile acids. Bile salts or bile acids can be used as emulsifiers to emulsify fats, reduce the surface tension of fats, and emulsify fats into microdroplets, which are dispersed in aqueous solution, which increases the area of action of pancreatic lipase; Bile acids can also be combined with fatty acids to form water-soluble complexes that promote the absorption of fatty acids, in short, bile is of great significance for the digestion and absorption of fats.

9. Bile does not contain digestive enzymes, but is related to the digestion of fat, which is mainly used to make fat easy to digest. ,2,I only know that bile is a primary emulsifying fat, it can digest sugars, proteins? Pancreatic juice is not B, the most powerful digestive juice, containing trypsin, pancreatic amylase, pancreatic lipase, etc.

c, contains, 1, bile has no digestive effect.

The role of bile is mainly that of bile salts or bile acids. Bile salts or bile acids can be used as emulsifiers to emulsify fats, reduce the surface tension of fats, and emulsify fats into microdroplets, which are dispersed in aqueous solution, which increases the area of action of pancreatic lipase; Bile acids can also combine with fatty acids to form water-soluble complexes that promote the absorption of fatty acids. In conclusion, bile is of great significance for the digestion and absorption of fats.

That is, even for fat, it is only made that the fat becomes small particles. 0, as a digestive juice, to help the digestion and absorption of fat in the intestines, note that the digestion and absorption of these substances are their own division of labor. For example, proteins enter the stomach first and are destroyed by pepsin to become peptide chains.

It then enters the intestine to break down into amino acids, which are actively transported into the bloodstream by the epithelial cells of the small intestine. Sugars are also hydrolyzed by enzymes into simple sugars before they can be absorbed by the body, or turned into glycogen and stored in the liver. 0,

Bile is the digestive juice secreted by the liver stored in the gallbladder, and the main component of bile salt involved in digestion and absorption is the sodium salt or potassium salt formed by the combination of bile acid produced by the liver metabolizing cholesterol and glycine Qingsun, and most of the digestive cover enzymes are proteins, which are often enzymes secreted by the pancreas, stomach and small intestine for digestion, and it can be said that bile is a metabolite and has the role of digestion.

Emulsifying.

1.Materials: detergent, peanut oil, test tubes, droppers.

Experimental design: add a certain amount of peanut oil to the test tube, add detergent drop by drop with a dropper, and constantly shake to observe whether it becomes turbid, and then in the other two.

Detergent and peanut oil were added separately to the test tube, and constantly shaken, and the control group was added to the expected experimental result: only when detergent was added to the peanut oil would it become turbid2Constant oscillation.

== Ingredients: fresh chicken bile, test tubes, droppers, peanut oil.

Experimental design: (1) Take out two test tubes and mark them with No. 1. No. 2.

2) Pour one milliliter of bile into tube No. 1 and one milliliter of water into tube No. 2.

3) Use a dropper to drop one drop of peanut oil in each of the two test tubes.

4) Put the two test tubes in 37 degree warm water for three minutes (the specific time depends on the situation) (5) Take out the test tubes and observe the experimental results.

Expected experimental results: peanut oil in tube 1 was decomposed and there was no significant change in tube 2.

In order to see the expected results, I think that the temperature should be regulated, and the temperature in the test tube must be 37 degrees Celsius.

a Intravenous glucose drips for patients who cannot eat, the purpose is to provide energy for the human body a correct;

b. The bile secreted by the liver is a digestive juice that does not contain digestive enzymes, which plays an emulsifying role in fat digestion, and b. is correct;

c. Sugars, proteins, and fats must be digested before they can be absorbed by the human body, and sugars are eventually decomposed into grape lead and sugar, fats are decomposed into glycerol and fatty acids, and proteins are decomposed into amino acids and then absorbed by the human body into the circulatory system.

d. Vitamins are neither the main raw materials that constitute tissues, nor the most important substances for energy, but it has an important role in various life activities of the human body

Therefore, d

Fat. PS: The role of bile is mainly that of bile salts or bile acids.

Bile salts or bile acids can be used as emulsifiers to emulsify fats, reduce the surface tension of fats, emulsify fats into microdroplets, and disperse them in aqueous solution, so as to increase the area of action of pancreatic lipase; Bile acids can also be combined with fatty acids to form water-soluble complexes to promote the absorption of fatty acids.

What is the function of bile is as follows: the bile acids in bile can emulsify fat, making it a latex colloid, and can activate pancreatic lipase to promote the digestion and absorption of fat. Bile is both a digestive and excretory fluid.

In addition to bilirubin, drugs, metabolites, poisons, dyes and heavy metal salts that enter the human body can be excreted into the intestines with bile and then excreted from the body by feces. To put it bluntly, it is a catalyst for the digestion of fats.