PSYCH 330 1st Edition Lecture 16Hormones and the Brainmotivated behavior directed by the hypothalamus, hypothalamus stimulates different systems depending on where the hypothalamus itself is stimulatedhormones travel long distanceshormones responsible for homeostasis, reproductive functions, stress response(cortisol) hypothalamus>pituitary>pituitary releases hormone>that hormone travels through the bloodstream to a target(gonads,etc)hormones differ by structure, steroid hormones are made from cholesterol, fat soluble so they cantravels through the organ/blood brain barrier, peptide hormonesDNA>proteinRegulatory and non regulatory behaviorregulatory=keeping balance, if you deviate your body wants to bring you back to homeostasis -temperature regulationeating/drinking salt consumption waste eliminationnon regulatorynot for basic needs or dependent on for homeostasisThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.frontal cortex and limbic systems are upstream systems trickling down to the hypothalamus -influenced by external stimuli, i.e sexual behavior, parental behavior, food preference aggression,curiosity, readinginteractions with environment, influenced by social cueseating for homeostasis you need digestive cues to initiate, can have cognitive cuessomething looks good or smells goodHomeostasisset point=optimal value or your comfort leveldetector=when your body goes above or below threshold it is detected; receptors are detectors -peptide like CCK/ghrelin is released to tell brain im hungry(ghrelin, green light to eat),or i’m full(CCK, inhibitory, red light to stop)lateral hypothalamus is away from the midline and initiates green light, for satietythe ventromedial hypothalamussuppresses, gives red light; if the ventromedial is damaged you overeatcorrectional mechanism=gets you back to set pointLearningcognitive influences result in learned associations, smell something bad/learned from getting sickfrom food that it is badamygdala responsible for taste aversioninferior prefrontal cortex takes cues from your olfactory bulb(smell)Drinkingfor thirst>osmotic, to correct cellular dehydration which happens if the solutes draw too much outfor replacementvolumetric, lose water through sweat and blood needs to be