Small Intestine Sections and Functions
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Questions and Answers

What is the main function of the gastric glands in the stomach?

  • To produce mucus
  • To regulate stomach pH
  • To absorb nutrients
  • To secrete digestive enzymes (correct)

    • What type of cells primarily make up the walls of the gastric pit?

  • Mucous cells (correct)
  • Enteroendocrine cells
  • Oxyntic cells
  • Goblet cells

    • What is the approximate increase in surface area of the small intestine due to the combination of circular folds, villi, and microvilli?

  • 800-fold
  • 500-fold
  • 600-fold (correct)
  • 700-fold

    • How does the stomach protect itself from self-digestion?

    <p>By secreting a thick coat of bicarbonate-rich mucus</p> Signup and view all the answers

    Which part of the small intestine is responsible for the absorption of bile acids and vitamin B12?

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

    What is the main function of the small intestine in the digestive system?

    <p>To absorb nutrients</p> Signup and view all the answers

    What is the outermost layer of the gastrointestinal tract composed of?

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

    What is the name of the junction that connects the small intestine to the large intestine?

    <p>Ileocecal sphincter</p> Signup and view all the answers

    What are the two main types of gastric glands in the stomach mucosa?

    <p>Oxyntic and pyloric glands</p> Signup and view all the answers

    Which of the following neural plexuses is located in the submucosa layer of the gastrointestinal tract?

    <p>Meissner’s plexus</p> Signup and view all the answers

    What is the main function of the duodenum in the small intestine?

    <p>Neutralisation of protein, lipid, and carbohydrate digestion</p> Signup and view all the answers

    What is the main function of the mucosa layer in the gastrointestinal tract?

    <p>Absorption of nutrients and secretion of hormones</p> Signup and view all the answers

    What percentage of total saliva secretions is contributed by the major salivary glands?

    <p>90%</p> Signup and view all the answers

    What is the primary function of saliva in digestion?

    <p>Moisten the food</p> Signup and view all the answers

    What is the pH of saliva?

    <p>7</p> Signup and view all the answers

    What is the pharynx part of?

    <p>Both the digestive and respiratory systems</p> Signup and view all the answers

    What component of the digestive system processes ingested foods into molecular forms?

    <p>Gastrointestinal tract</p> Signup and view all the answers

    What is the purpose of the digestive system?

    <p>To transfer small molecules, ions, and water to the body's internal environment</p> Signup and view all the answers

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