105 practice MCQs across 8 topics
Which of the following statements about the regulation of gastric acid secretion is CORRECT?
A 48-year-old woman with Zollinger-Ellison syndrome (gastrinoma) presents with severe peptic ulcer disease. Her serum gastrin level is 850 pg/mL (normal <100). Which of the following mechanisms best explains her elevated gastric acid output?
A 55-year-old man with chronic atrophic gastritis presents with achlorhydria (pH >6.0 in fasting gastric juice). Which of the following best explains the mechanism of reduced acid secretion in this condition?
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