Stomach Anatomy and Histology
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Questions and Answers

Which layer of the stomach is responsible for secreting alkaline mucus to protect the stomach lining from acidity?

  • Muscularis externa
  • Serosa
  • Mucosa (correct)
  • Submucosa
  • In which region of the stomach are the gastric glands rich in mucous cells, forming a columnar epithelium to protect the stomach lining from acid?

  • Corpus (Body)
  • Cardia (correct)
  • Fundus
  • Antrum
  • Which type of gastritis is characterized by short-term sudden inflammation or swelling in the stomach mucosa with the presence of neutrophils?

  • Helicobacter pylori gastritis
  • Gastropathy
  • Acute Gastritis (correct)
  • Chronic Gastritis
  • What are the primary damaging factors under normal conditions that affect the stomach?

    <p>Gastric acidity and peptic enzymes</p> Signup and view all the answers

    Which layer of the stomach contains fats, fibrous tissue, blood vessels, and lymphatics?

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

    Which region of the stomach has deep gastric pits and gastric glands rich in G and D cells?

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

    What is the primary cause of Helicobacter pylori gastritis?

    <p>Helicobacter pylori bacteria</p> Signup and view all the answers

    Which layer of the stomach contains an additional layer that helps to further churn food, a middle circular layer, and an outer longitudinal layer?

    <p><strong>Muscularis Propria/externa</strong></p> Signup and view all the answers

    Chronic Gastritis is characterized by the presence of which types of cells?

    <p><strong>Lymphocytes and Plasma cells</strong></p> Signup and view all the answers

    Which of the following is a less common cause of autoimmune gastritis?

    <p>Chronic bile reflux</p> Signup and view all the answers

    What is the predominant transmission route of Helicobacter pylori in lower socioeconomic areas?

    <p>Fecal-oral</p> Signup and view all the answers

    Where does Helicobacter pylori predominantly occur with normal or increased acid production?

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

    What can Helicobacter pylori infection cause that can transform into lymphoma?

    <p>Mucosa-associated lymphoid tissue</p> Signup and view all the answers

    What is the stomach pH normally?

    <p>$1.5-2$</p> Signup and view all the answers

    What does Helicobacter pylori produce that increases gastric pH for its survival?

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

    Which step of invasion by Helicobacter pylori involves the production of urease?

    <p>Step 2</p> Signup and view all the answers

    Which toxin involved in disease progression causes colonization and proliferation of immune cells?

    <p>Cytotoxin-associated gene A (CagA)</p> Signup and view all the answers

    What does H. pylori use to allow bacterial motility in the stomach?

    <p>$Flagella$</p> Signup and view all the answers

    What is the main cause of parietal cell damage in autoimmune gastritis?

    <p>Parietal cell antibodies</p> Signup and view all the answers

    Which of the following is a characteristic feature of autoimmune metaplastic atrophic gastritis (Type A gastritis)?

    <p>Affects fundus/corpus of the stomach</p> Signup and view all the answers

    What is the main consequence of autoimmune gastritis on acid production in the stomach?

    <p>Hypochlorhydria (low HCL)</p> Signup and view all the answers

    Which of the following diseases is NOT associated with autoimmune gastritis?

    <p>H.pylori infection</p> Signup and view all the answers

    What is the main effect of hyperplasia of G cells in the antrum in the pathogenesis of autoimmune gastritis?

    <p>Stimulation of ECL cells in the corpus</p> Signup and view all the answers

    What process leads to an increase in risk for dysplasia/carcinoma in autoimmune gastritis?

    <p>Loss of parietal cells</p> Signup and view all the answers

    What is the reason behind the increased risk of gastric neuroendocrine tumors in autoimmune gastritis?

    <p>Loss of parietal cells</p> Signup and view all the answers

    What can be detected via immunofluorescence in autoimmune gastritis?

    <p>Parietal cell antibodies</p> Signup and view all the answers

    What is primarily affected by hyperplasia in the pathogenesis of autoimmune gastritis?

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

    Which of the following is NOT a characteristic feature of autoimmune metaplastic atrophic gastritis?

    <p>Increase in pH levels</p> Signup and view all the answers

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