PSY1011 Chapter Notes - Chapter 12: Neuropeptide Y, Lateral Hypothalamus, Eating Disorder
7 Aug 2018
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Document Summary
Factors that account for the initiation, direction, intensity, and persistence of behaviour. People are motivated to behave in ways that maintain optimal aroual levels. Behaviour is directed towards attaining desirable stimuli and avoiding undesirable stimuli. Gut microorganisms produce specific chemicals in response to food. Glucose, fatty acid and amino acid levels are monitored. Hormone levels are closely associated with hunger. Hormone ghrelin is released when low nutrient levels are detected, and produces a start eating signal. Hormone leptin is a satiety hormone; signal to stop eating: also associated with fat storage: as fat supply in cells increases, leptin production also increases. Hypothalamus is associated with eating and hunger. Neuropeptide y stimulates carbohydrate intake, whilst serotonin suppresses it. Eating large amounts of food then self-inducing vomiting. Also stems from a fear of being fat. E. g. receiving a tangible reward; money, praise.
