PSYCH 1XX3 Lecture Notes - Lecture 10: Opioid Receptor, Olfactory Receptor, Postcentral Gyrus

• School: McMaster University
• Department: Psychology
• Course: PSYCH 1XX3
• Professor: Joe Kim

Document Summary

Food seeking is as much a lifestyle as it is a necessity. Food consumption once dominated our everyday life (were for survival) Smell is just as important as taste in guiding feeding behaviour. Blood glucose levels regulate feelings of hunger and satiation. Body can store glucose in the form of glycogen which can be released between meals. Main supply of glycogen is in the liver where it can be readily converted into glucose when glucose levels are low. Glucose-glycogen level mediated by a pancreatic hormone know as insulin. Glycogen stores help maintain blood glucose levels over the course of a day. When glucose and glycogen levels get too low you will feel hungry and will want to eat. However, when they are at a substantial level you will not feel hungry and the cycle can continue without eating. High levels of activity in the hypothalamus, driven by npy (neuropeptide y) are associated with increased appetite and food seeking behaviours.