is a sensory-stimulating experience closely associated with pleasure Opioids are the key nuerochemical
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Wanting
is closely related to motivation and drive, an emotions experience that builds Key nuerochemical is dopamine
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learning association
we learn to associate smells, tastes, thoughts, images, faces, etc with rewarding/ negative outcomes Associations between events or responses that lead to pleasurable responses Key neurochemicals include dopamine, serotonin, and acetylcholine
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ventromedial hypothalamus
Bilateral Lesioning of this area led to overeating and obesity in lab rats ( satiety center) Role in insulin secretion
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lateral hypothalamus
Bilateral lesioning of this area resulted in reduced eating and decreased body eeight in lab rats ( hunger center)
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Insulin
neurochemical Secreted from the Pancreas Facilitates the storage of energy in body fat and liver tissue
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Leptin
Hormone that plays a key role in hunger regulation Produced in adipose tissue (fat cells) Mice who were deficient became obese Critical hunger regulatory signal conveying metabolic info from the body to the hypothalamus
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Grehlin
Chemical secreted by endocrine cells in the stomach Activates receptors in the arcuate nucleus of the hypothalamus (NPY/AgRP) Levels decrease after a meal, and increase during fasts
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Nueropeptide Y (NPY)
Released from the hyptothalmus when energy demands increase increased food intake; appetite stimulating (orexigenic) Leptin and insulin inhibits it Ghrelin stimulates it
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arcuate nucleus of the hypothalamus
Located in the hypothalamus Control center for eating Produce AgRP, NPY, cocaine- and amphetamine-regulated transcript (CART), Proopiomelanocortin (POMC) neurons
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Anorexia nervosa
Being at a significantly low bodyweight for ones developmental stage, having an exaggerated fear of gaining weight, having an unrealistic perception of weight, and demonstrating persistent behavior that interferes with weight gain
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bullimia nervosa
An eating disorder characterized by the behaviors of binging (excessive overeating) and purging (removing food from one’s system via strategies such as self-induced vomiting or use of laxatives).