NBME 22 Processing of antigen by Langerhans cells, leading to activation of CD4+ T cells (NBME Answers)

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Retired NBME 22 Answers

nbme22/Block 1/Question#39 (reveal difficulty score)
A 23-year-old woman develops multiple red, ...
Processing of antigen by Langerhans cells, leading to activation of CD4+ T cells 🔍 / 📺 / 🌳 / 📖
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submitted by ∗mcl(671)

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Poison ivy triggers a type IV hypersensitivity (mediated by T cells); only one of the answer choices mentions T cells.

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submitted by ∗drschmoctor(137)

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According to UW, contact dermatitis can be CD4+ and/or CD8+ T cell mediated, with urushiol (poison ivy) dermatitis being primarily mediated by CD8+ T cells.

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submitted by ∗impostersyndromel1000(42)

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would anyone be able to clarify what the others would be? A) Allergen mediated vasoconstriction, leading to ischemic tissue injury: Type I B) Binding of antigen to IgE on the surface of mast cells leading to mast cell degranulation: Type I C) deposition of antigen-antibody complexes within postcapillary venules, leading to activation of complement: Not sure D) Phagocytosis of antigen by neutrophils, leading to oxidant mediated tissue damage: Type III?

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sunny i think C is type III +3

sunny i think C is type III +1

dentist In Type III HS, First C happens then then D happens +1

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