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Dendritic cells present extracellular-acquired antigen to which type of cell? A) epithelial cells B) mast cell C) B cell D) T cell E) macrophage - ANSWER D) t cell Which of the following is NOT a characteristic of a cytokine? (A) it is a protein produced by infectious agents, such as bacteria (B) it binds to a specific receptor on host cells (C) it is an intercellular signaling molecule (D) it can act locally or systemically (E) it can have multiple effects, depending on the target ...