BIO 201 Lecture Notes - Lecture 11: Aorta, Gastrin, Insulin
Document Summary
Lipid absorption: chylomicrons: reassembled triglycerides and lipoproteins in microscopic complex in bloods (almost a single cell, single phospholipid layer, high density lipoproteins/low density lipoproteins. No gallbladder: post-gastric fermenters include tapir, elephants, equines, rabbits, rodents, koala, wombat and possoms. Control of gastrointestinal mobility: little brain: 2-10 million neurons, gastrointestinal reflexes: gastrocolic (colon activated by full stomach, gastroileal reflex (ileum stimulated by full stomach) Intestine-intestinal reflex: activity inhibited by stretch or injury. Hormonal control of appetite: leptin: produced by fat cells, inhibits hypothalamic appetite centre, ghrelin: produced by stomach when empty to increase hypothalamic appetite centre, pyy: produces by small intestine, inhibits hypothalamic appetite centre. Insulin: produced by endocrine pancreas, released after meal to move glucose into body cells, inhibits hypothalamic appetite centre. Animals without circulatory systems: any animal that is small (< 1mm diameter, any animal that is thin (< 1mm thick, remember sa:v ratio.
