Digestion within the human body?

Question

Results of the chemical digestion of carbohydrates, proteins and fats and discuss if this digestion occurs in the mouth, stomach and/or small intestines. Please help!!!!. i need the help now and FAST!! thankyou.. best answer will be reawarded 10 points.

Answer 1

Not sure but I know that chemical digestion takes place in both the mouth and stomach.

Answer 2

This answer can get extremely detailed, but I'm going make it straight to the point.  At the same time, I will exclude absorption which a whole other topic.  Keep in mind that there is a story to this whole process

Mouth

Carbohydrates being to get digested by salivary amylase.  This enyme secreted by the salivary glands.

Lipid digestion begins in the mouth with lingual lipase.

Stomach

Salivary amylase is inactivated by acidity of stomach and carbohydrate digestion temporarily stops

Proteins begin digestion in the stomach by stomach acid activated pepsins

Lipid digestion continues in the stomach by the action of gastric lipase

Intestines

Digestion of carbohydrates resume as a result of the pancreatic secretion of amylase. Further digestion occurs via lactase, sucrase, isomaltase and glucoamylase.

Proteins continue to be digested by pancrease secreted enzymes, trypsin, chymotrypsin, carboxypeptidase A, carboxypeptidase B, and elastase.  Further digestion occurs with aminopeptidases, dipeptidyl aminopeptidases, dipeptidyl carboxypeptidases, and amino-oligopeptidases.

Lipid digestion main occurs here in the intestine.  There is release of bile from the gallbladder causing droplets of fat to form, which increases surface area for enzyme action.  The enzymes at work are glycerol ester hydrolase, colipase, cholesterol ester hydrolase, and phospholipase A.

The result of this entire process is the breakdown of polymers into trimers, dimers, or monomers.  That is, large molecules are broken down in to smaller/simpler molecules.  These smaller molecules are able to be absorbed in the intestines.

Answer 3

All three

in your mouth, both mechanical digestion(chewing) and chemical digestion occur. The chemical digestion happens to starches through salivary amylase.

In your stomach, pepsin digests proteins

In your small intestines, pancreatic amylase further digests starches and yah.

there is a whole list of other things going on, try looking for a list of enzymes in the stomach and released/produced by the pancreas.

good luck

Answer 4

Physical and Chemical Digestion Begin in the mouth. The Physical Digestion is obviously the chewing, and the chemical digestion is the salivary amylase breaking down the complex carbs into disaccharides like maltose. then after the food passes down through the esophagus, the food enters the stomach. In the stomach, both chemical and physical digestion continue. The salivary amylase is denatured (stops working) in the stomach due to the high acidic content. The acid that is secreted is secreted with pepsinogen, and inactivated form of pepsin which is activated in low pH levels as found in gastric juice. The pepsin breaks down proteins into dipeptides. The small amount of physical digestion that occurs here is the stomach churning. The food passes out of the stomach after 4-6 hours as a soupy liquid called chyme. once it enters the small intestine, the pH becomes slightly basic and the pancreatic enzymes begin to work. Pancreatic amylase continues the work of salivary amylase, maltase breaks down maltose into monosaccharides, protease and trypsin break down dipeptides into amino acids, bile from the liver physically emulsifies fats into smaller droplets and then lipase from the pancreas breaks down lipids into fatty acids and glycerols. These products are then absorbed into the capillaries in villii and the lacteals of the lymphatic system.

Carbohydrates->Mouth+Amylase->disaccha... intestine+maltase->monosaccharides(gluco...

proteins-> stomach+pepsin-> dipeptides-> small intestine+protease/trypsin-> amino acids

lipids-> small intestine+lipase-> fatty acid and Glycerol