Psychology 2220A/B Chapter 12: Chapter 12 for final

• School: Western University
• Department: Psychology
• Course: Psychology 2220A/B
• Professor: Dr.Yves Bureau

Document Summary

Digestion, energy storage and energy utilization: the purpose of eating is to provide the body with molecular building blocks and energy, digestion: breaking down food and absorbing its constituents. Theories of hunger and eating: set points vs. If we eat to maintain an energy level (homeostasis), what is monitored? (c. 1940s and 1950s: glucostatic theories: glucose levels determine when we eat. Lipostatic theories: fat stores determine how much we eat over long term (explaining why weight tends to be constant) Factors that determine what, when, and how much we eat: adaptive species-typical preferences, sweet and fatty foods: high energy, salty: sodium rich, adaptive species-typical aversions, bitter: often associated with toxins. Physiological research on hunger and satiety (outline: role of blood glucose levels, myth of hypothalamic centers, role of the gi tract, hunger and satiety peptides, serotonin and satiety. Myth of hypothalamic hunger and satiety centers: experiments suggested two hypothalamic centers, ventromedial (vmh): a satiety center, lateral (lh): a hunger center.