PSYC 1000 Lecture Notes - Lecture 13: Caffeine, Xerostomia, Bulimia Nervosa

• School: University of Guelph
• Department: Psychology
• Course: PSYC 1000
• Professor: Jeffrey Yen

Document Summary

Motivation is a complex interaction of biological, social, and psychological factors expenditure. Energy homeostasis long-term matching of food intake to energy. Baseline metabolic rate (bmr) at rest, the rate at which a body uses energy. Positive energy balance: calories intake exceeds expenditure: weight gain. Negative energy balance: calorie intake falls short: weight loss for vital functions. Glucose: form of sugar that circulates in blood and provides a major source of energy. Orexigenic signals tell the hypothalamus to switch hunger on. Anorexigenic signals tell the brain to switch hunger off. When glucose level is low, we feel hunger. Carbohydrates temporarily raise serotonin, reducing stress and depression: other tastes acquired through culture, conditioning, different cultures/societies encourage different tastes. Situational influences: social facilitation, unit bias. Others" presence accentuates typical habits (cid:498)bottomless bowl(cid:499) Tendency to assume unit of sale is appropriate. Hypothalamic centers in the brain monitoring appetite. Memory of time elapsed since last meal. Responses to cultural preferences for appearance (cid:498)disordered(cid:499) eating factors.