PSYC 1000 Lecture Notes - Lecture 13: Milkshake, The Reward, Nucleus Accumbens

• School: University of Guelph
• Department: Psychology
• Course: PSYC 1000
• Professor: Dan Meegan

Document Summary

Drives states of internal tension that motivate behaviour to reduce the tension e. g. , hunger or thirst: states that we do not want to be in and are therefore motivated to get out of it. Drive reduction when you"re successful in reducing that state of tension. Homeostasis a state of physiological equilibrium that the body strives to maintain. Body energy regulation the control centre (brain) motivates one to eat and convert stored energy (response system) which gives one energy (internal state), which is sensed by the gut and brain: the cycle repeats. Sensors: mechanical stomach and intestinal distension, chemical nutrients (lipid, glucose) and peptide hormones/neurotransmitters (pyy, Ghrelin, leptin, orexin, cck, etc. : glucose sensors brain (hypothalamus) and gut (liver) When blood glucose levels decrease, the liver converts your stored nutrients to glucose and the hypothalamus triggers hunger. When blood glucose levels increase, the liver stops converting stored nutrients into glucose, and the hypothalamus triggers satiety.