PSYCH 1XX3 Lecture Notes - Lecture 12: Adipose Tissue, Blood Sugar, Neuropeptide Y
3 Jul 2017
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Document Summary
Hunger and satiety: hunger and satiety cycles throughout the day. Insulin (pancreatic and liver hormone) largely mediate glucose-glycogen balance: most glycogen stored in liver, some in muscle, g;ycogen helps maintain blood glucose levels over course of day, example: Liver and pancreas help buffer extreme swings in blood glucose levels. Is an appetite stimulant promotes food seeking behavior: high levels of activity in hypothalamus caused by npy is associated with increased appetite and food seeking behavior like other non-human mammals. Liver monitors glucose levels to control hunger and satiety. It can send signal to brain triggering hunger but also signal triggering satiety: high glucose and glycogen = satiety signals. Low glucose and glycogen levels = hunger signals. Individual injected with cck feel satiated faster: reason you have only one bowl of cereal instead of 10. Long-term energy storage: hunger and satiety cues = short-term, fat (i. e. adipose tissue) is a form of long term energy storage.
