NUSC 1645 Lecture Notes - Lecture 2: Peptide Yy, Orexigenic, Dynorphin
9 Apr 2018
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Food and nutrient intake: behavioral and body regulation. Ex: in america, it"s not culturally acceptable to eat insects or bugs. But in other culture, it"s fine to eat insects and bugs. In some religion, there is periodic fasting or feast. Conclusion: interactions between the environmental factors and internal factors. Central circuit of food intake is the brain. Internal: your body will release hormones to signal the brain that your body need food. Hypothalamus regulates food intake in your brain by activating arcuate nucleus : hungry (hypothalamus became red) Endorphins: released when you feel pleasurable after eating or drinking. Dopamine: brain chemical that is important for motivating human to eat (starving) 1)stomach releases hormones when you are hungry or before your customary mealtime (ghrelin released when your stomach is empty) 2)adipose tissue (body fat) : release leptin from your fat tissue (not to be hungry or stop eating) External: habits, experiences, pleasure, mood social situation, rhythm, economy, knowledge, attitude, culture, food.
