The digestive juices in the human body that can digest both starch and protein as well as fats are

Trypsin and pancreatic lipase are included in the pancreatic fluid secreted by the pancreas.

The intestinal fluid secreted by the small intestine contains intestinal protease and intestinal lipase.

These two digestive juices digest both starch and protein.

Water vitamins do not need to be digested and are directly absorbed.

Protein is first decomposed into polypeptides by pepsin in gastric juice and trypsin in pancreatic juice, and then into amino acids by peptidase in intestinal fluid.

Eventually, the body absorbs these amino acids instead of directly absorbing proteins.

It is absorbed by small intestinal epithelial cells.

d.Intestinal fluids.

Pancreatic juice Because intestinal fluid and pancreatic juice contain enzymes that digest sugars, proteins, and fats, the digestive juice in the human body that can digest both starch and protein and fat is intestinal fluid.

Pancreatic juice. As for bile, it simply breaks down fat into fat particles, not digests.

d。Platelets and white blood cells. The 60 pages of the second semester of the first year of junior high school biology books are written, and at the junction of the two layers, there is a very thin layer of white substance, which are white blood cells and platelets. So the answer is d, d.

Pancreatic juice. Water and vitamins are not digested and are directly absorbed.

Proteins are digested by proteases, and pepsin is present in gastric juice. There are various trypsins and intestinal peptidases in the intestines.

Specific enzymes see a question I've had.

Water and vitamins do not need to be digested, and proteins are digested by pepsin into polypeptides, and then digested by trypsin and intestinal proteasin.

Starch is saliva, fat is bile, protein is what to forget.

The order of precedence is starch, protein, fat.

The starch is first digested in the oral cavity, and the saliva contains Kaimeng salivary amylase, which preliminarily breaks down the starch into maltose.

The first part of protein digestion is the stomach, and pepsin initially breaks down the protein into polypeptides.

The digestion of fat is mainly carried out in the small intestine, first in the upper part of the small intestine, through the peristalsis of the small intestine, the bile salts in the bile emulsify the food lipids into oil-in-water small colloidal particles, improve the solubility and increase the contact area between the enzyme and the lipids. Under the action of enzymes in pancreatic juice, the digestion of lipids in food begins.

All three are finally thoroughly digested in the small intestine under the action of pancreatic juice and intestinal juice-digesting enzymes.

For the digestion of fat foci and proteins, the digestive juice with the strongest effect is ()aSaliva. b.Gastric juice.

c.Pancreatic juice implicit.

d.Bile. e.The small intestine is noisy and depleted.

Correct answer: c

d Analysis:

The decomposition of food in the digestive tract is a digestive process, and the most important end product of starch digestion is glucose, and the end product of fat deskinning and transformation is glycerol and fatty acids.

Starch is digested from the moment it enters the mouth. Amylase in saliva can partially decompose carbohydrates and can break down starch into maltose; In the duodenal cleft remnant, enzymes in pancreatic juice and intestinal fluid break down starch into glucose.

Protein is not digested until it enters the stomach. The gastric egg-derived white enzyme in the gastric juice preliminarily digests the protein; In the duodenum, enzymes in the pancreatic and intestinal juices break down proteins into amino acids.

Fat is melted after entering the duodenum. Bile emulsifies fat into many droplets, and enzymes in pancreatic and intestinal juice break down fat into fatty acids and glycerol.

Amino starch is digested into maltose by the salivary amylase, which secretes wax in the mouth, and then digests into glucose in the small intestine and is absorbed. Protein is digested in the stomach as polypeptides, and then digested in the small intestine as amino acids and absorbed.

Fats are emulsified into micro-fatty particles by bile powder secreted by the liver, which are then digested into glycerol and fatty acids in the small intestine and absorbed.

Therefore, the digestive juice that digests starch, eggs, white matter, and fat is intestinal fluid.

Pancreatic juice, containing pancreatic amylase, pancreatic lipase, trypsin, while intestinal fluid does not have proteases, there are peptidases.

Hello, Tianjin Silver Star Finance will answer for you:

The digestion process of protein, starch and fat is as follows: the digestion of starch starts from the mouth and the salivary amylase in the oral cavity can interpret part of the starch into maltose, when the starch and maltose enter the small intestine, because the pancreatic juice and intestinal fluid in the small intestine contain enzymes to digest sugars, therefore, starch and other sugars are thoroughly digested into glucose in the small intestine; The digestion of protein starts from the stomach, when the protein in the food enters the stomach, it enters the small intestine after preliminary digestion under the action of gastric juice, and the pancreatic juice and intestinal fluid in the small intestine contain enzymes that digest proteins, and under the action of these enzymes, the protein is thoroughly digested into amino acids; The digestion of fat begins in the small intestine, the pancreatic juice and intestinal fluid in the small intestine contain enzymes to digest fats, and at the same time, the bile secreted by the liver also enters the small intestine, although bile does not contain digestive enzymes, but bile has an emulsifying effect on fat, making fat into tiny particles, increasing the contact area between fat and digestive enzymes, which is conducive to the digestion of fat, and fat is completely decomposed into glycerol and fatty acids under the action of these digestive juices, that is, the starting digestive site of starch, fat and protein is the mouth, small intestine, and stomach

When starch and maltose enter the small intestine, because the pancreatic juice and intestinal fluid in the small intestine contain enzymes that digest sugars, fats and proteins, starch and other sugars are thoroughly digested into glucose in the small intestine

The digestion of protein begins in the stomach, when the protein in the food enters the stomach, it enters the small intestine after preliminary digestion under the action of gastric juice, and the pancreatic juice and intestinal fluid in the small intestine contain enzymes that digest sugars, fats and proteins, and under the action of these enzymes, the protein is thoroughly digested into amino acids

The digestion of fat begins in the small intestine, the pancreatic juice and intestinal fluid in the small intestine contain enzymes to digest sugars, fats and proteins, and at the same time, the bile secreted by the liver also enters the small intestine, although bile does not contain digestive enzymes, but bile has an emulsifying effect on fat, making fat into tiny particles, increasing the contact area between fat and digestive enzymes, which is conducive to the digestion of fat, and fat is completely decomposed into glycerol and fatty acids under the action of these digestive juices

Therefore, the initial digestion of starch, fat, and protein in the human body is the oral cavity, small intestine, and stomach

Answer d The digestion of starch starts from the oral cavity, the salivary amylase in the oral cavity can decompose part of the starch into maltose, when the starch and maltose enter the 2113 small intestine, because the pancreatic juice and intestinal fluid in the small intestine contain enzymes that digest 5261 sugars, fats and proteins, therefore, starch and other sugars are thoroughly digested into glucose in the small intestine; The digestion of protein starts from the stomach, and after the protein in the food enters the stomach, it enters the small intestine after preliminary digestion under the action of gastric 4102 liquid, and the pancreatic juice and intestinal fluid in the small intestine contain enzymes that digest sugars, fats and proteins, and under the action of these enzymes, the protein is thoroughly digested into amino acids; The digestion of fat begins in the small intestine, the pancreatic juice and intestinal fluid in the small intestine contain enzymes that digest sugar 1653 classes, fats and proteins, at the same time, the bile secreted by the liver also enters the small intestine, although bile does not contain digestive enzymes, but bile has an emulsifying effect on fat, so that fat becomes tiny particles, and the contact area between fat and digestive enzymes is increased carefully, which is conducive to the digestion of fat, and fat is completely decomposed into glycerol and fatty acids under the action of these digestive juices; Therefore, the organs that begin chemical digestion of starch, protein, and fat in the digestive tract are the mouth, stomach, and small intestine

Therefore, d