HUBS1406 Lecture Notes - Lecture 10: Resting Metabolic Rate, Pancreatic Polypeptide, Anorectic
12 Oct 2018
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Document Summary
Influenced by eating and exercise habits (changeable) & genetics (unchangeable). Send signals to drive us to eat or to stop eating. Obese people have low levels of pyy (pancreatic peptide y, which is an appetite suppressant released by the large intestine. The hypothalamus contains a feeding centre (hunger) and a satiety centre (stop eating). Energy cost of digestion, absorption, mobilisation and storage of food. Most variable component of energy expenditure (260 > 5000 kcal/day). Thyroid hormone level- increased with increasing thyroid hormone level. Components which supply energy and are consumed in the greatest amounts. Need to be broken down before they can be absorbed and used. Substances that are only required in tiny amounts. Don"t provide energy, but essential for normal function. Contents mixed, liquidised and moved along the gi tract by contractions of the smooth muscle of the gut. After digestion, absorption of the simple sugars, amino acids, fatty acids, vitamins, ions can occur.
