PSYCH 1XX3 Lecture Notes - Lecture 3: Thalamus, Local Food, Olfactory Bulb
14 Apr 2016
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* seeking food and drink are goal-directed behaviors. * human evolutionary past food were scarce and behaviors were motivated by constant need to obtain energy & nutrients essential to survival. * in present context calories come cheaply and easily. Feeding behavioral= motivated by interaction of taste and smell (eg. study nose: food unenjoyably) Satiety= signals that lead you to stop consumption. Low blood glucose level= one reason to feel hungry. * glucose: important to body"s functions; preferred source of energy for the brain (it cannot use fat, making glucose top priority that"s why we are sensitive to its levels in the blood & directly relates to feelings of hunger) * glycogen: storage form of glucose; stored in muscles but mainly in the liver (where it can be readily converted back into glucose when circulating blood glucose is low) Glucose-glycogen balance is mediated by the liver and pancreatic hormone called insulin.
