Eosinophil are activated by: (A) IL 1, (B) IL5, (C) IL4, (D) IL6
Answer is B. ref Robbins 8/e p200; IL 5 is required for the development and maturation of eosinophil Through binding to the interleukin-5 receptor, interleukin 5 stimulates B cell growth and increases immunoglobulin secretion - primarily IgA. It is also a key mediator in eosinophil activation.