PSYCH 1XX3 Lecture Notes - Lecture 10: Glycogen, Insulin, Energy Economics
18 May 2017
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Document Summary
Food seeking is as much a lifestyle as it is a necessity. Body needed regular nourishment to function optimally. Drinking and eating is more than nutrition, it is living: brings family and friends, feeding gives your pleasure. Behaviours motivated by constant need to obtain energy & nutrients for survival. Not in the modern day: calories come cheaply and easily. Smell is just as important in guiding feeding behaviour. Sleep = longest fast in entire day. Many signals and complex interactions b/w brain & digestive system driving feelings of hunger to consume food & drink and satiety signals to stop. Blood glucose levels regulate feelings of hunger and satiation. Glycogen stored to release glucose during fasting: liver and muscle. Glycogen stores help maintain blood glucose levels over the course of a day. Insulin cells uptake glucose for immediate use & stored as glycogen. Low blood sugar glycogen converted into glucose and used glycogen stores decrease status signal sent to brain hunger.
