UNC-Chapel Hill BIOL 252 - Digestive and Reproductive System (5 pages)

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Digestive and Reproductive System



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Digestive and Reproductive System

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Digestive and Reproductive System


Lecture number:
24
Pages:
5
Type:
Lecture Note
School:
University of North Carolina at Chapel Hill
Course:
Biol 252 - Fundamentals of Human Anatomy and Physiology
Edition:
1

Unformatted text preview:

BIOL 252 1st Edition Lecture 24 Outline of Last Lecture I PCT Tubular Reabsorption II Tubular Secretion III Loop of Henle IV Distal Convoluted Tubule and Collecting Duct V What about the loop VI Urine Storage and Elimination VII Digestive System VIII Saliva and Salivary Glands IX Layers of Digestive Tract X Peristalsis XI Stomach Outline of Current Lecture I Digestive System II Reproductive System Current Lecture I Digestive System a Gastric Motility i Stomach controls its own motility but may be influenced by vagus nerve ii Emetic center of medulla can cause reverse peristalsis via vagus nerve b Liver i Hepatocytes 1 Absorb from the blood a Glucose amino acids iron vitamins other nutrients for metabolism or storage b What do we do with glucose Make glycogen c Vein carrying deoxygenated blood has already exchanged w digestive tract cannot deliver O2 to liver so we must have an artery vein and artery in same direction 2 Degrade from blood a Hormones toxins bile pigments drugs 3 Secrete into blood These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute c d e f g a Glucose albumin lipoproteins clotting factors angiotensinogen other products 4 Excrete bile a Bile pigments bile salts Circulatory Routes i Portal system where left capillary bed liver right capillary bed ii Middle vessel hepatic portal vein Gallbladder i Bile salts mix w fats and emulsify makes them water soluble ii Liver secretes about 500 1000 mL of bile daily 80 of bile salts are reabsorbed in small intestine iii Gall bladder stores and concentrates bile 1 Bilirubin excretory product 2 Bile salts acids steroids synthesized from cholesterol Pancreas i Stomach s chyme is acidic pancreatic juice neutralizes contains HCO3 ii Proteases trypsinogen and carboxypeptidase iii Lipase iv Amylase v Ribonuclease and deoxyribonuclease vi Pancreatic zymogens proenzymes are converted to active enzymes in duodenum vii Nervous



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