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Explore how the brain signals hunger cues through taste, smell, and memory, and how hormones like insulin and leptin regulate appetite. Learn about the role of CCK in controlling fullness and how disorders like bulimia and anorexia can impact this intricate system. Discover the complexities of our body's survival instincts and the impact on our eating behaviors.
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Brain Signaling for Food By George Han, Sean Feng
INTRO • Essential part of life, nutrition, vitamins • Brain signals the quantity intake of food • Affected by smell, sight, and memory • Brain turned on by taste and emotion
Hypothalamus signals nerves in the stomach • Determines specific appetite • Amino acids (protein), fatty acids (fat), glucose (carbohydrates) • Insulin hormone sends brain message
Low glycogen level/Low blood sugar level • Stimulate activity in hypothalamus • Increasing sweet/starchy food desire • Ghrelin/Leptin circulation • NPY • Different types of food • Sweet/Starchy • High calories • Fat food
Leptin levels increase= cause of fullness • Inhibit firing of NPY • Galanin fat connection • Stores up fat • Evening • Enough calories to last through night
Food digested feeds body cells • Chlecystokinin (CCK) • Causing fullness, less appetite • Bulimia • Over eating disorder • Binge purge syndrome • CCK mechanism doesn’t function • Anorexics • Suffering from extreme thin • CCK mechanism is oversized
To sum up… • Human body has a complex system that signals our body for hunger. • Brain plays a big part of our survival instinct. • Bulimia and anorexia are caused by CCK malfunction.