NUTR 221 Lecture 13: Nut lecture 13
Document Summary
Non-uniform changing of shape of stomach allows for non-uniform. Tumbling of food in stomach! maximize mixing by shortening at different layers/sides. Secretes gastric juice and alkaline mucus (bicarbonate: alkaline mucus protective. Parasympathetic nervous system: vagus nerve major nerve of pns, has to do with secretion (rest and digest) Caused by the physical presence of food (sensors will inform system of what is happening to tissue- so when tissue is stretched then response is initiated) Stimuli: head (even before you put food in the oral cavity, looking at food/ smelling food can help initate), stomach (intro of food), small intestine (will tell to increase or decrease gastric activity) 12 feet long joins the large intestine at the ileocecal valve. Disaccharides enzymes: lactase, sucrase, maltase (come from epithelium cells)!lactose, sucrose, maltose (milk sugar, table sugar, glucose + glucose) Simple: water, lipids (not directly into cv system, goes through something else), fat-soluble vitamins, water-soluble vitamins.
