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: Physiology
[{'content': 'Capsaicin acts on ______ \nSelect and explain. \nA. Vanilloid receptor, B. Capsaicoid receptor, C. AMPA receptor, D. NMDA receptor', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Vanilloid receptor is a nociceptor. Capsaicin binds to\xa0Vanilloid receptor.', 'role': 'assistant'}]