This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
IgE receptors are present on 
Select and explain. 
A. Mast cells, B. NK cells, C. B cells, D. Histiocytes
A: Mast cells
Answer: A: Mast cells 
Explanation: Ref Robbins 9/e p201 Type 1 hypersensitivity is a rapid immunological reaction occuring in a previously sensitized individual that is triggered by the binding of an antigen to IgE antibody on the surface of mast cells