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NBME 18 Answers

nbme18/Block 1/Question#15 (20.1 difficulty score)
experimental animal with defect in an innate ...
Chronic gastritisπŸ”
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 +1 
submitted by sugaplum(326),
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pg32  I would also add that I think they are specifically trying to get us to think of pernicious anemia here, where parietal cells are destroyed/lose their fxn. In that case, ECL cells may hypertrophy to encourage acid secretion because the parietal cells are not responding to their usual signals. All the other answer choices are quite clearly incorrect, and Zollinger-Ellison is a gastrinoma, which causes hypertrophy of the gastric mucosa so that is also wrong. +8  



 +0 
submitted by cheesetouch(95),

Lose GI defense mechanism -> loss of parietal cells. ECL cells may hypertrophy to encourage acid secretion because the parietal cells are not responding to their usual signals. Zollinger-Ellison/gastrinoma causes hypertrophy of the gastric mucosa so that is also wrong.