BPK 205 Lecture Notes - Lecture 32: Steatorrhea, Galactose, Chymotrypsin

• School: Simon Fraser University
• Department: Biomedical Physio & Kines
• Course: BPK 205
• Professor: Nadine Wicks

Document Summary

Lecture 32 and 33 gastrointestinal system ii and iii. Cephalic phase comes before the oral phase: = anticipatory response at the though of food. Salivary secretions: under autonomic control -> mostly parasympathetic, functions, lubrication and moistening of food, chew food (mastication, solubilization of material for taste. Initial digestion of starches: due to salivary amylase, antibacterial actions, lysozyme = antibacterial enzyme, breakdown of bacteria/prevent infection. Immunoglobulins = antibodies: fight infections, parotid, sublingual, and submandibular glands secrete saliva. The mucus-bicarbonate barrier protects the gastric epithelium: gastric mucus cells, secrete mucus and hco3, epithelial cells with secretory function. 3: h+ denatures = unfolds the protein, pepsin then cleaves the protein at specific locations to create polypeptide fragments of different sizes. Secretions into the lumen of the stomach. Buffers gastric acid to prevent damage to epithelium. Digests fats: acid secretion -> if there is protein in the stomach then want more acid to denature proteins and create get more pepsinogen secretion, ***know this table.