<prompt> Which of these is false regarding cytokines:Mediators of inflammationDoes not mediate specific reactionsProduced by macrophagesAre soluble proteins  <response>: Cytokines mediate their effects by binding to specific high-affinity receptors on their target cells. Specific cytokines mediate specific reactions.Other important characteristics of cytokinesCytokines are soluble proteins produced by a wide variety of hematopoietic and non-hematopoietic cells.They are short acting.They are required forRegulation of growthActivation of the immune systemMediation of inflammatory response 