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: Surgery
[{'content': 'Which of the following is activated by the binding of chemotactic agents to leukocyte membrane receptors? \nSelect and explain. \nA. Leukotriene B 4, B. Histamine, C. Phospholipase C, D. Tumor necrosis factor', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Phospholipase C The binding of chemotactic agents to receptors on leukocyte cell membranes causes activation of phospholipase C. A hydrolysis reaction ensues resulting in the release of calcium from intracellular stores. The increased cytosolic calcium is impoant in the movement of the cells in chemotaxis.', 'role': 'assistant'}]