Gastrointestinal System

    Gastrointestinal System
    Why is insulin not given as an oral drug?
    Insulin is a protein so would be hydrolysed by protein-digesting enzymes in the stomach (and duodenum).
    Author: rikazzz Comment
    Gastrointestinal System
    Which of the following organs is an accessory organ of the gastrointestinal tract?
    The other three are all part of the digestive tract itself.
    Author: rikazzz Comment
    Gastrointestinal System
    A function of the LARGE intestine is to:
    The products of digestion have been absorbed before the remaining contents reach the LI. It absorbs additional water to make faeces a paste.
    Author: rikazzz Comment
    Gastrointestinal System
    What is the purpose of “intrinsic factor” in gastric juice?
    Vitamin B12 is a large molecule which cannot be absorbed without forming a complex with intrinsic factor.
    Author: rikazzz Comment
    Gastrointestinal System
    Which list of sections of the intestine has them in correct order from nearest to furthest from the mouth?
    Caecum is after the ileum; sigmoid colon is after the transverse colon; jejunum is before the ileum.
    Author: rikazzz Comment
    Gastrointestinal System
    Which parts of the alimentary canal prepare food for chemical digestion?
    The mouth (mastication and mixing with saliva), the stomach (churning) and the duodenum (segmentation). Choice C is better than choice B as digestion has occurred before food reaches the distal parts of the SI.
    Author: rikazzz Comment
    Gastrointestinal System
    Which of the functions below is NOT performed by the liver?
    Glucagon is a hormone that is produced by the pancreas.
    Author: rikazzz Comment
    Gastrointestinal System
    Which digestive enzyme in saliva breaks down starch?
    Amylase is the salivary enzyme that begins digesting starch.
    Author: rikazzz Comment
    Gastrointestinal System
    Which of the following is NOT a function of the mucosa of the small intestine?
    Segmentation is caused by the muscularis externa, not the mucosa.
    Author: rikazzz Comment
    Gastrointestinal System
    What is the term applied to the production of glucose from noncarbohydrate molecules?
    Gluco refers to glucose; neo = new; and genesis = producing (glycogenolysis is the production of glucose from glycogen – by lysis.)
    Author: rikazzz Comment