BIBC 120 Lecture Notes - Lecture 3: Temporomandibular Joint, Temporal Muscle, Delivery (Commerce)
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Document Summary
Digestion: food goes through the gi tract: mouth -> esophagus - There"s gradual delivery of nutrients over time: overall functions of the gi tract, mouth: chewing, digestion of starch, esophagus: passage way. Interactions between salt, bitter, and sour receptors: < 100 mm na+ attracts us to food, > 300 mm na+ activates sour and bitter receptors, causing aversion. Cl- enters parietal: chief cells: source of pepsinogen (activated by acid to pepsin, surface mucous cells: release mucus to protect stomach lining from acid and proteases and from inflammation induced by food antigens, digestion in an infant"s stomach. Infant stomach not mature, because has lower acid production: babies < 1-year-old shouldn"t eat raw honey. Clostridium botulinum which grow and produce botulinum toxin that paralyzes muscle: ~40% of mothers start feeding infants solid food at 4 months. Solid food too early can up risk of diabetes, obesity, celiac.
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