NTRI 2000 Lecture Notes - Lecture 3: Thyroid, Myelin, Lymph Node
25 Sep 2017
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Fat, lipid, protein synthesis: ribosome, cytoplasmic particle that functions in protein synthesis, lysosome. Garbage disposal -cell"s digestive system: digest worn-out or damaged cell components, peroxisome, detoxify harmful chemicals (ex. Influx of sodium into neuron and loss of potassium as message is sent: concentrations restored to normal after signal passes, making it ready to conduct another message. Lipase (fat: small intestine (si, site for most digestion and absorption of chyme, 3 segments (approx. 10 ft long: duodenum (~10 in, jejunum (~4 ft) Ileum (~5 ft: folded walls, villi, fingerlike protrusions, microvilli, extensive folds on the mucosal surface of the absorption cells; increase surface area by 600, absorptive cells (enterocyte) Intestinal cells that line villi and participate in nutrient absorption: nutrient absorption, passive diffusion, diffusion of nutrient across the absorptive cell membranes, facilitated diffusion, fats and some minerals. 4: uses a carrier protein to move nutrients down a concentration gradient, active absorption, fructose (fruit sugar)
