Polysaccharides, Lipids, And Nucleic Acids

996 WordsNov 13, 20154 Pages
. Polysaccharides, proteins, fats, and nucleic acids are enzymes responsible for the chemical digestion of each of the macromolecules. Polysaccharides are secreted by carbohydrates in the small intestine and is produced by the pancreas with monosaccharides. Proteins break down to amino acids that get secreted first by the stomach and finish the process in the small intestine. Fats are secreted by small intestine and the process of the conversion of fats is monoglycerides and fatty acids, nucleic acids are broken down to nucleotides which are DNA and RNA that have been secreted by the small intestine. 2. The layers of the GI tract consist of mucosa by producing mucus to protect against pathogens and the lining is epithelium. Submucosa is responsible for the blood and lymph vessels for the absorption of nutrients, would find nervous tissue and glands for the secretion of lumen. In the muscularis there are three layers called circular layer where it extends the diameter of the GI tract the other layer is longitudinal is where the muscle runs along the length of the digestive tract and oblique, all allow for movement in the GI tract. Serosa is a serous that reduces friction in the wall of the GI tract. 3. The components of the saliva is to have water, which helps to moisten food and it’s 99.5% water, amylase is the beginning of starch digestion, mucus helps to trap pathogens and aid in the swallowing process by binding food together into a bolus, lysozyme helps to kill
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