33:630:363 Lecture Notes - Lecture 6: Gastrointestinal Tract, Digestion, Glycerol
Document Summary
Functions: to hydrolyze, or break down using water, macromolecules to their subunit molecules. Subunits: monosaccharides, amino acids, fatty acids, and glycerol. Food also contains water, salts, vitamins and minerals that help the body function normally they are made available by digestive processes and carried by the blood to our cells. Digestive tract (gi tract) is a tube that begins with the mouth and ends with the anus. Gi tract: mouth/oral cavity, pharynx, esophagus, stomach, small intestine, large intestine, anus. Accessory digestive organs: salivary glands, pancreas, liver, gall bladder. Digestion occurs in two phases: by wavelike contractions of smooth muscles in the small intestine. Mechanical processing: occurs in the mouth by chewing and. Chemical breakdown (hydrolysis): digestive enzymes hydrolyze our food"s macromolecules into absorbable subunits; begins in the mouth, continues in the stomach, and is completed in the small intestine: absorption: occurs as subunit molecules produced by chemical digestion (ex. Very similar for the entire gi tract hollow tube.