Digestive Gland Secretion by Hormones PDF

Youtube video link(s) to this presentation 13Control of Digestive Gland Secretion by Hormones: https://youtu.be/adZmwcrxBXU Control of the GI tract | Gastrointestinal system physiology | NCLEX-RN | Khan Academy: https://www.youtube.com/watch?v=_kfB2qKjdgM IV. Control of Digestive Gland Secretio...

Youtube video link(s) to this presentation 13Control of Digestive Gland Secretion by Hormones: https://youtu.be/adZmwcrxBXU Control of the GI tract | Gastrointestinal system physiology | NCLEX-RN | Khan Academy: https://www.youtube.com/watch?v=_kfB2qKjdgM IV. Control of Digestive Gland Secretion by Hormones A continuation of the digestive system Hormone: – Substance produced by one set of cells, travels through the blood and affects another set of cells – ie. Chemical messengers A. Gastrin Rich protein meal Gastrin secretion from lower part of stomach (-) Via blood Receptors for Gastrin  Protein breakdown on gastric cells of upper stomach Gastric cells release gastric [Pepsin] juice (HCl + pepsinogen) B. Secretin Acid chyme in Stimulates wall of duodenum Duodenum to secrete secretin (-) Via Blood Enzymes digest the Stimulates the pancreas chyme & HCO3- to release digestive enzymes neutralizes the acid & HCO3- (bicarbonate ion) C. Cholecystokinin (CCK) Fat & Protein Stimulates wall of duodenum in duodenum to secrete CCK (-) Via Blood  Digestion of acid [Digestive enzymes] chyme in duodenum from the pancreas & gall bladder contraction [bile] going into the duodenum  V. Accessory Organs or Glands A. Pancreas - Produce bicarbonate (HCO3- ) - produce digestive enzymes - produce hormones Insulin & Glucagon Allows cells to take up Stimulates liver/ glucose from blood muscles to undergo (lowers blood sugar gluconeogenesis level) (glycogen  glucose)  B. Liver Function: 1. Destroys old red blood cells 2. Produce bile (stored in gall bladder) 3. Stores glucose as glycogen (glucose + glucose + …..  glycogen) 4. Produce urea from amino acid breakdown (Deamination) 5. Make blood proteins (e.g.. Albumin: to osmotic pressure in blood) 6. Detoxifies blood kwashiorkor NB: The blood vessels which pick up the absorbed nutrients, toxins, etc must funnel into the hepatic portal vein. This vessel brings the substances to the liver for processing. NB: BMR (Basal Metabolic Rate) - the lowest amount of energy needed by your body to keep you alive.