Anatomy Quiz: Muscularis Externa and Blood Vessels
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Questions and Answers

Leptin is to satiety as what is to hunger?

  • Gastrin
  • Pepsin
  • Cholecystokinin
  • Ghrelin (correct)
  • Which is not a reason the stomach is acidic?

  • Denatures proteins
  • Kills microorganisms
  • Helps break down plant cell walls and connective tissue in meat
  • Emulsification of lipids (correct)
  • Which of the following is true regarding digestion and absorption in the stomach?

  • Lipid digestion begins in the stomach
  • Digestion is complete after chyme moves out of the stomach (correct)
  • Carbohydrate digestion begins in the stomach
  • Small proteins can be absorbed with the help of pepsin
  • Which of the following is not involved in the regulation of gastric activity?

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

    Stimulation of gastric stretch receptors causes all of the following except

    <p>A decrease in myenteric plexus stimulation (A)</p> Signup and view all the answers

    Which cranial nerves control both intrinsic and extrinsic movements of the tongue?

    <p>Hypoglossal (A)</p> Signup and view all the answers

    Which salivary gland secretes a mucous-rich fluid that serves as a buffer and lubricant?

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

    What structure holds each tooth in its alveolar socket?

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

    Which muscle is NOT involved in swallowing among the listed options?

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

    What type of epithelium lines the oropharynx?

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

    Which layer in the digestive tract wall directly supports the digestive epithelium?

    <p>Muscularis mucosae (A)</p> Signup and view all the answers

    Where can a stratified squamous epithelial lining be found?

    <p>Anal canal (A)</p> Signup and view all the answers

    What feature of the digestive tract wall increases surface area available for absorption?

    <p>Rugae (A)</p> Signup and view all the answers

    Where are large blood vessels and lymphatics found?

    <p>Adventitia (A)</p> Signup and view all the answers

    Which layer in the digestive tract wall is sandwiched between circular and longitudinal muscle in the muscularis externa?

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

    What structure supports all but 25 cm of the small intestine, providing stability and limited movement?

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

    Which layer of the intestinal wall contributes to the mesentery?

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

    What is the function of mass movements in the colon?

    <p>Propel feces toward the rectum (B)</p> Signup and view all the answers

    Which part of the large intestine follows the transverse colon?

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

    What is the primary function of the large intestine?

    <p>Reabsorption of water and compaction of feces (D)</p> Signup and view all the answers

    What are haustra?

    <p>Expansible pouches of the colon (D)</p> Signup and view all the answers

    Which part of the digestive tract is approximately the last 15 cm?

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

    Which of the following enzymes helps to break down fats in the digestive system?

    <p>Lipase (A)</p> Signup and view all the answers

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

    <p>To emulsify and aid in the absorption of fats (A)</p> Signup and view all the answers

    According to the passage, why do circular muscles contract behind the bolus during swallowing?

    <p>To push the bolus forward (C)</p> Signup and view all the answers

    Which type of salivary glands produce the glycoproteins called mucins?

    <p>Submandibular glands (A)</p> Signup and view all the answers

    What is the name of the region of the stomach that connects to the esophagus?

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

    Which enzyme is primarily responsible for breaking down proteins in the stomach?

    <p>Pepsin (A)</p> Signup and view all the answers

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