Among the following items, the one that does not belong to the role of dietary fiber on the human body is

Answer B

Dietary fiber only promotes intestinal peristalsis and can eliminate hunger. , it can also promote the metabolism of cholesterol in the body and cannot be absorbed and utilized by the body, so eating more will not increase your weight.

What are the main components of dietary fiber?

Non-starch polysaccharides are the main components of dietary fiber, which include cellulose, hemicellulose, pectin, lignin and hydrophilic colloidal substances (such as gums and seaweed polysaccharides) and other components, and also includes lignin contained in plant cell walls. In recent years, some non-cell wall compounds, such as some substances that are not decomposed by human digestive enzymes (such as resistant starch and resistant oligosaccharides), products of the Millard reaction, and different substances derived from animals, have been Substances digested by digestive enzymes [such as aminopolysaccharides (also known as chitin)] are also included in the composition of dietary fiber. Although the content of this type of substance in human diet is small, it still has certain physiological activity. Various components of dietary fiber have different physiological properties and effects. For example, cellulose cannot be digested by enzymes in the human gastrointestinal tract, so it is hydrophilic and can absorb a large amount of water in the digestive tract; hemicellulose is easier to be decomposed by bacteria than cellulose, and it has the function of binding ions. Some components of hemicellulose are soluble. The soluble hemicellulose in cereals is called pentosan. They can form a viscous aqueous solution and have the effect of lowering serum cholesterol; pectin also has the ability to interact with ions. The ability to combine; gum can be dispersed in water, has viscosity, and can act as a thickener; lignin cannot be digested by humans and animals; resistant starch includes modified starch and starch that have been heated and then cooled. They are not absorbed in the small intestine. The components of dietary fiber measured according to the currently introduced methods are roughly divided into the following categories. ①Total dietary fiber (TDF): includes all components, such as non-starch polysaccharides, lignin, resistant starch (including retrograded starch and modified starch) and Maillard reaction products. ②Soluble dietary fiber (SDF): includes hydrophilic colloidal substances such as pectin and part of hemicellulose. ③Insoluble dietary fiber (IDF): including cellulose, lignin and some hemicellulose. (Editor: Taotao)

Which of the following is not an effect of dietary fiber on the human body [ ] A. Promote intestinal peristalsis...

B

What foods contain dietary fiber?

Dietary fiber: It is the edible part of plants and cannot be digested and absorbed by the small intestine. It is of health significance to the human body and has a polymerization degree of ≥3 carbohydrates.

Dietary fiber can prevent constipation, dyslipidemia, diabetes, and is beneficial to intestinal health.

Dietary fiber is rich in plant foods, and vegetables generally contain 3%. The content in fruits is about 2%.

Carrots, celery, shepherd's purse, spinach, and leeks are higher than tomatoes, eggplants, etc.;

Pineapples, strawberries, and water chestnuts are higher than bananas, apples, etc.

The dietary fiber content of the edges and peels of the same vegetable or fruit is higher than that of the center.

Therefore, when people eat uncontaminated vegetables and fruits, they should try to eat the peel and peel together with the cabbage heart and pulp.

Normal adults should consume 25 to 30 grams of dietary fiber every day.

This is easy to do, because normal adults need to consume 300-500 grams of vegetables and 200-400 grams of fruits every day; including those with a lot of dietary fiber.

Which foods belong to dietary fiber?

Traditional fiber-rich foods include wheat bran, corn, brown rice, soybeans, oats, buckwheat, wild rice, celery, bitter melon, fruits, etc. Animal experiments show that vegetable fiber is more beneficial to the human body than cereal fiber. Although foods rich in dietary fiber have the above-mentioned benefits, they should not be a partial eclipse. The correct dietary principles are: reduce fat intake, appropriately increase the proportion of vegetables and fruits, and maintain nutritional balance. Excessive dietary fiber may affect the absorption of calcium, iron and some vitamins. But if used in the right amount, it will have more advantages than disadvantages.

As long as we have a reasonable mix of coarse and fine grains and eat more fruits and vegetables, dietary fiber will do wonders for your health and longevity

Which of the following statements is incorrect (　) A. Known as the "seventh nutrient" is dietary fiber B. To measure the energy in a certain food, you can use burning energy

A. There is also a substance called cellulose in human diet, which is mainly contained in vegetables and crudely processed cereals. Although it cannot be It is not digested and absorbed, but it has functions such as promoting intestinal peristalsis and facilitating fecal discharge, so it is called the "seventh type of nutrient". Option A is correct. B. To measure the energy in a certain food, you can use the combustion method. The heat released when each gram of food is completely oxidized and burned is called the heat price; option B is correct. C. In order to promote someone's wound healing after surgery, it is recommended that he eat more protein-rich foods, because protein is the basic component of human tissue cells; eat more fruits and whole grains to supplement vitamins and dietary fiber; option C is incorrectly described ． D. Eating more green vegetables containing vitamin A can prevent night blindness, dry eye syndrome, etc.; option D is correct. Therefore choose: C.

What is the function of dietary fiber?

Helps gastrointestinal motility and secretes digestive juices from the digestive glands. It can soften stool, relieve constipation and prevent colon cancer. But it cannot be digested and absorbed by itself, so it is called the seventh nutrient.

Among the following statements about the nutrients contained in food, which one is incorrect (　) A. Vegetables are the main source of certain vitamins, inorganic salts and dietary fiber B.

A. Vegetables are rich in vitamins that regulate human physiological functions, contain fiber, and a large amount of chlorophyll, etc., so A is correct; B. Cereals contain only 20%-30% sugar. In addition, they also contain fat and other ingredients, so B is wrong; C. Grease is a general term for oils and fats. It is hydrolyzed in the human body to produce higher fatty acids and glycerol, which can be oxidized and decomposed to release energy for life activities, so C is correct; D. The type and content of amino acids determine the quality of protein, and animal meat is a food with high protein content, so fish, shrimp, eggs, milk, etc. can provide high-quality protein, so D is correct; so choose B.