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: Anatomy
[{'content': 'Example of direct chemoreceptors are: \nSelect and explain. \nA. Olfactory receptor neuron., B. Taste buds., C. Vomeronasal organ., D. All of the above.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Chemoreceptor (Chemosensor) is a sensory receptor that transduces a chemical signal into an action potential. There are two main classes of chemosensor.\na) Direct:\nTaste buds are direct chemoreceptors. Aqueous chemical compounds come into contact with chemoreceptors in the mouth such as taste buds on the tongue and trigger responses.\nb) Distant: \nOlfactory receptor neurons in the olfactory system. The main olfactory epithelium (MOE) and the Vomeronasal organ (VNO) detects odorants and pheromones respectively.', 'role': 'assistant'}]