HLSC 2P91 Lecture Notes - Lecture 5: Hepatic Veins, Central Nervous System, Bifidobacterium
19 Oct 2016
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Document Summary
Appetite: psychological desire for specific food, driven by environmental cues (senses, triggered by association. Hunger and satiety: physiological sensation, non-specific (any food, regulated by the brain (hypothalamus, sometimes over-ridden by appetite, receive signals (neurological or hormonal) based on level of food in the gut and blood. Digestion- foods are broken down by chemical and mechanical processes to the smallest absorbable unit. Absorption- moving products of digestion across intestinal wall into blood stream or lymphatic system. Elimination- removal of undigested and unabsorbed products from the body. Transport- move products through the blood stream or lymphatic system to parts of the body that require them. Storage- excess products that are digested and absorbed are kept in specialized regions of the body for later use. Basic anatomy of the gi tract or lumen: considered external to the body, required protective mechanisms from outside threats when absorbing nutrients, mouth, pharynx, esophagus, stomach, small intestine, large intestine, sphincter.
