4.3
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Questions and Answers

What are the two main secretions of the alimentary tract?

  • Saliva and bile
  • Gastric juice and bile
  • Gastric juice and pancreatic juice (correct)
  • Mucus and somatostatin
  • What are the two main secretions in the alimentary tract?

  • Amylase and lipase
  • Saliva and gastric acid
  • Bile and chyme
  • Digestive enzymes and mucus (correct)
  • Which type of glands respond to irritation of the epithelium by extruding mucus onto the surface?

  • Crypts of Lieberkühn
  • Salivary glands
  • Pancreatic glands
  • Goblet cells (correct)
  • Which of the following is NOT one of the primary saliva glands?

    <p>Zygomatic gland (C)</p> Signup and view all the answers

    What stimulates mucus secretion in the alimentary tract through local epithelium stimulation and tactile stimulation?

    <p>Distention of the gut wall (D)</p> Signup and view all the answers

    What inhibits the production of HCL?

    <p>Somatostatin (D)</p> Signup and view all the answers

    Which hormone is responsible for stimulating the release of pancreatic enzymes?

    <p>CCK (B)</p> Signup and view all the answers

    Which type of stimulation greatly increases glandular secretions in the alimentary tract?

    <p>Parasympathetic stimulation (B)</p> Signup and view all the answers

    How are gastrointestinal hormones classified based on their secretion mechanism?

    <p>Endocrine and paracrine (B)</p> Signup and view all the answers

    What is the main function of mucus in the alimentary tract?

    <p>Protecting the lining of the tract (C)</p> Signup and view all the answers

    What is the primary function of enterohepatic circulation?

    <p>Recycling bile salts (A)</p> Signup and view all the answers

    What cellular process leads to the exocytosis of contents from glandular cells in the alimentary tract?

    <p>Calcium entry (B)</p> Signup and view all the answers

    What is the main protein found in the serous secretion of saliva?

    <p>Ptyalin (B)</p> Signup and view all the answers

    Which gland secretes the most saliva and has a secretion that is only serous?

    <p>Parotid Gland (B)</p> Signup and view all the answers

    Which nerve is responsible for stimulating the Parotid gland?

    <p>CN IX (glossopharyngeal nerve) (A)</p> Signup and view all the answers

    What inhibits saliva secretion according to the text?

    <p>Fear (B)</p> Signup and view all the answers

    What is the function of lingual lipase in saliva?

    <p>Hydrolyzes triglycerides (D)</p> Signup and view all the answers

    How is secondary secretion of bicarbonate ions in salivary ducts achieved?

    <p>Passive exchange of HCO3- for Cl- (D)</p> Signup and view all the answers

    What is the primary function of bile acids in the digestive process?

    <p>Emulsify large fat particles for pancreatic lipase enzymes (A)</p> Signup and view all the answers

    Which two primary bile acids are synthesized from cholesterol in the liver?

    <p>Cholic acid and chenodeoxycholic acid (B)</p> Signup and view all the answers

    What stimulates gallbladder contraction and emptying, especially with fatty foods?

    <p>Cholecystokinin (CCK) (C)</p> Signup and view all the answers

    What happens when food does not contain fat in relation to gallbladder emptying?

    <p>Gallbladder doesn't empty at all (A)</p> Signup and view all the answers

    How are bile salts formed in hepatocytes from cholesterol?

    <p>Cholesterol combines with bile salts and lecithin to form micelles (D)</p> Signup and view all the answers

    What contributes to the formation of gallstones under abnormal conditions?

    <p>Inflammation of the gallbladder epithelium (D)</p> Signup and view all the answers

    Which gastric product is responsible for the anemia in the patient with antibodies directed against gastric parietal cells?

    <p>Intrinsic factor (B)</p> Signup and view all the answers

    What hormone is most likely secreted by a tumor in a patient presenting with heartburn, weight loss, and increased fasting gastric acid output?

    <p>Cholecystokinin (B)</p> Signup and view all the answers

    Which of the following fluids has the highest pH level?

    <p>Colonic luminal contents (A)</p> Signup and view all the answers

    In achlorhydria patients, which nutrient's digestion is most severely impaired?

    <p>Protein (C)</p> Signup and view all the answers

    After resection of the ileum and part of the jejunum, what condition is likely to develop?

    <p>Constipation (B)</p> Signup and view all the answers

    Which gastrointestinal hormone is not involved in regulating acid secretion but might contribute to other functions in the digestive system?

    <p>Motilin (C)</p> Signup and view all the answers

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