This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
[{'content': 'Which of these is false regarding cytokines: \nSelect and explain. \nA. Mediators of inflammation, B. Does not mediate specific reactions, C. Produced by macrophages, D. Are soluble proteins', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Cytokines mediate their effects by binding to specific high-affinity receptors on their target cells. Specific\xa0cytokines mediate specific reactions.\n\nOther important characteristics of cytokines\n\nCytokines are soluble proteins produced by a wide variety of hematopoietic and non-hematopoietic cells.\nThey are short acting.\n\nThey are required for\n\nRegulation of growth\nActivation of the immune system\nMediation of inflammatory response', 'role': 'assistant'}]