Cephalic Phase of Gastric Secretion Pathway
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Questions and Answers

What stimulates the activation of parietal cells in the stomach?

  • Acetylcholine release from the brain
  • Distension of the stomach (correct)
  • Presence of chemoreceptors
  • Release of gastrin from G cells
  • Which hormone stimulates the parietal cells to release more acid in the stomach?

  • Gastrin (correct)
  • Insulin
  • Secretin
  • Glucagon
  • What is the main function of chief cells in the stomach?

  • Produce HCl
  • Produce pepsinogen (correct)
  • Produce gastrin
  • Absorb nutrients
  • What triggers the release of gastrin from G cells in the stomach?

    <p>Presence of chemoreceptors</p> Signup and view all the answers

    Which enzyme is responsible for carbohydrate digestion in the stomach?

    <p>Amylase</p> Signup and view all the answers

    In which phase is the pancreatic response similar to the cephalic phase?

    <p>Gastric Phase</p> Signup and view all the answers

    Which phase of gastric acid secretion is initiated before food enters the stomach?

    <p>Cephalic phase</p> Signup and view all the answers

    In which region of the small intestine do bile acids emulsify fats to aid digestion?

    <p>Duodenum</p> Signup and view all the answers

    Where are bile acids actively absorbed after aiding fat digestion?

    <p>Ileum</p> Signup and view all the answers

    What is the process called where bile acids are absorbed and returned to the liver?

    <p>Enterohepatic circulation</p> Signup and view all the answers

    Which hormone regulates gastric acid secretion when food enters the stomach?

    <p>Gastrin</p> Signup and view all the answers

    What type of receptors in the intestinal mucosa initiate the intestinal phase of gastric secretion?

    <p>Both mechanoreceptors and chemoreceptors</p> Signup and view all the answers

    What is the primary function of acetylcholine (ACh) released by the vagus nerve during the cephalic phase?

    <p>To stimulate the release of gastric acid from parietal cells</p> Signup and view all the answers

    Which hormone plays a key role in stimulating gastric acid secretion during the cephalic phase?

    <p>Gastrin</p> Signup and view all the answers

    Which receptor does gastrin bind to on pancreatic acinar cells during the cephalic phase?

    <p>CCK-1 (CCK-alpha) receptor</p> Signup and view all the answers

    Which pathway is responsible for stimulating pancreatic secretion during the cephalic phase?

    <p>Both long vagovagal reflex and endocrine pathway</p> Signup and view all the answers

    What is the maximum percentage of the total gastric secretion response that can be produced during the cephalic phase?

    <p>30%</p> Signup and view all the answers

    Which statement is true regarding the cephalic phase of gastric secretion?

    <p>It is under both long/vagovagal reflex control and endocrine (local) control</p> Signup and view all the answers

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