PSB-2000 Lecture Notes - Lecture 16: Blood Sugar, Allostasis, Calorie Restriction
Document Summary
Homeostasis: biological processes that keep our body variables within a fixed range. Set point: a single value that the body works to maintain (levels of water, acidity, salt, calcium, protein, fat, oxygen) Allostasis: the adaptive way in which the body changes its set point in response to changes in life or the environment. Prevalence of eating disorders suggest that set point is not the whole story. Over half of the adult us population is obese. 3% of us adolescents suffer from anorexia or bulimia. Released by pancreas to help glucose enter cells for use or storage. Low levels of insulin and glucose are hunger signals. High levels of insulin and glucose are satiety signals. Promotes release of fatty acids from adipose tissue (fat) for body to use as fuel. Eating blood glucose increases, insulin release increases insulin helps glucose enter cells for use or storage. Insulin levels decrease hunger back to eating.
