PSYCH 202 Lecture Notes - Lecture 31: Blood Sugar, Monosaccharide, Glucagon
22 Feb 2018
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For nutrients & energy: because something looks/sounds/smells good, to be social (because others are eating, bored, distracted, happy/celebrating, unhappy. Hunger = based on internal signal to eat. Sometimes these two happen at the same time, but other times they can occur separately. Physiological hunger signals: circulating nutrients (including "blood sugar", circulating hormones (from stomach, intestines, fat cells, neural activity in the hypothalamus. Simple sugar used by body and found in food sources: cycle, glucose (ready energy for cells) -> insulin (helps convert to glycogen;used by cells) -> Insulin reduces blood sugar: glucagon (hormone produced by pancreas) converts glycogen to glucose. Insulin: (one) hunger signal: reduces glucose in bloodstream, promotes use by cells, promotes storage into glycogen, released during three phases of eating (roughly: before, during, after) Straightforward explanation of why seeing/smelling/thinking about food can make you hungry. Diabetes mellitus: type 1: body doesn"t produce (or stops producing) enough insulin, type 2: body doesn"t respond to insulin (loss of sensitivity)
