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