PSYC 2230 Lecture Notes - Lecture 3: Thermostat, Opiate, Family Therapy

• School: York University
• Department: Psychology
• Course: PSYC 2230
• Professor: Pauline Charlton

Document Summary

Feelings of hunger rise and fall with levels of glucose and insulin. Possible link to the number of fat cells in the body. Lesioning leads to self-starvation: ventromedial hypothalamus (vmh) Vmh stimulation causes an animal to stop eating. Short-term appetite regulation: pancreas hormone insulin helps convert glucose into fat, when glucose levels fall, insulin productions increases and we feel hungry, cholecystokinin (cck) satiety hormone produced by the intestine, ghrelin appetite stimulant produced by stomach. The glycemic index of some common foods: unhealthy breakfast trends. Super-sizing : calorie amount of energy needed to raise the temperature of 1 g of water 1 degree celsius. Laboratory mice with a defective gene for regulating the hormone leptin become obese. Leptin levels increase with body fat: neurons in the arcuate nucleus (arc) of the hypothalamus contain many receptors for leptin, cholesterol and disease. Best predictor of heart disease is the amount of bad cholesterol (ldl) in the body.