S114 Lecture Notes - Lecture 2: Digestive Enzyme, Chyme, Amylase
Document Summary
A process by which foods are broken down, absorbed & excreted by the body. The presence of food stimulates the flow of saliva, which contains salivary amylase. This kick starts the digestive process; the process of carbohydrates ensues. attaches pharynx to the stoma located b/w esophagus & stomach. Food is mixed w/ acidic stomach secretions to form chyme. Stomach secretions are regulated by the nervous system and hormonal mechanism from the brain, stomach & small intestines. Narrow tube about 20 ft. in length. Consists of 3 parts: duodenum, jejunum, ileum. The small intestines is the primary site for absorption of vitamins, minerals, water; products from carbs, proteins, fats & sugar. These items pass through the villi & microvilli. Digesting enzymes (trypsin& chirotrypsin) (f) = breaks down protein. Amount of h2o & fiber can affect transit time and end product (ex. Items in chyme that are not absorbed goes into the large intestines.
