This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Basic Concepts, Subject name: Pathology
[{'content': 'All of the following are not false about cytokines, except: \nSelect and explain. \nA. Include interleukins, B. Produced only in sepsis, C. Cytokines are polypeptides, D. Can have paracrine action', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Cytokines Definition Small, water-soluble, signaling proteins & glycoproteins secreted by hematopoietic & non-hematopoietic cells Also called Interleukins, because they mediate communication between leukocytes Functions Mediate specific cellular interactions and functions of leukocytes Site of action May act on: Cells that produce them (autocrine action) or On neighboring cells (paracrine) and rarely At a distance (endocrine)', 'role': 'assistant'}]