Digestive System Anatomy and Function
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Questions and Answers

What is the function of the muscularis mucosa in the alimentary canal?

  • Promotes mechanical digestion (correct)
  • Releases hormones
  • Contains clusters of lymphocytes
  • Increases chemical exposure
  • What is the role of the accessory organs in the digestive system?

  • Help breakdown food (correct)
  • Produce bile
  • Secrete hormones
  • Transport food through the alimentary canal
  • Why is skeletal muscle present at both ends of the alimentary canal?

  • To control what enters and exits (correct)
  • To secrete digestive enzymes
  • To regulate blood flow to the canal
  • To increase mechanical digestion
  • Which layer of the alimentary canal replenishes itself every 3-7 days?

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

    What is the function of the lamina propria in the alimentary canal?

    <p>Contains blood and lymphatic vessels</p> Signup and view all the answers

    How does the muscularis aid in digestion in the alimentary canal?

    <p>Promotes mechanical digestion</p> Signup and view all the answers

    What is the main function of the parietal cells in the stomach?

    <p>Secrete intrinsic factor for vitamin B12 absorption</p> Signup and view all the answers

    Which hormone is responsible for stopping segmentation in the small intestine and initiating peristalsis?

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

    What is the correct sequence of the three phases of gastric secretion?

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

    Which part of the stomach has an additional oblique smooth muscle layer in its muscularis?

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

    Which cell type in the stomach secretes an acidic mucus that is different from mucus produced by goblet cells?

    <p>Mucus neck cells</p> Signup and view all the answers

    What is the role of microvilli in the small intestine?

    <p>Enhance absorption and finish digestion</p> Signup and view all the answers

    How often does the stomach produce a mixing wave during digestion?

    <p>Every 20 seconds</p> Signup and view all the answers

    What causes deactivation of salivary amylase in the stomach?

    <p>Acidity in the stomach</p> Signup and view all the answers

    What is the purpose of villi in the small intestine?

    <p>To increase surface area for absorption</p> Signup and view all the answers

    How do circular folds influence absorption in the small intestine?

    <p>They increase surface area for absorption.</p> Signup and view all the answers

    What is the primary function of the myenteric plexus?

    <p>Controlling contractions of the muscularis</p> Signup and view all the answers

    Which component of the peritoneum lines the abdominal wall?

    <p>Parietal peritoneum</p> Signup and view all the answers

    What is the primary function of the uvula?

    <p>Preventing food from entering the nasopharynx</p> Signup and view all the answers

    Which of the following is NOT a function of the tongue?

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

    Which salivary gland is responsible for producing the majority of saliva?

    <p>Parotid gland</p> Signup and view all the answers

    What is the primary function of the pharynx?

    <p>Both digestion and respiration</p> Signup and view all the answers

    Which of the following is NOT a phase of swallowing (deglutition)?

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

    What is the primary function of the stomach?

    <p>Containing food and initiating digestion</p> Signup and view all the answers

    Which of the following statements about the stomach is NOT true?

    <p>Its size correlates with body weight</p> Signup and view all the answers

    Which of the following is responsible for the sensation of thirst?

    <p>Decreased saliva production</p> Signup and view all the answers

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