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: ENT
[{'content': 'Otoacoustic emissions arise from ? \nSelect and explain. \nA. Outer hair cells, B. Inner hair cells, C. Both, D. Organ of coi', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Otoacoustic Emissions (OAEs) They are low intensity sounds produced by outer hair cells of a normal cochlea and can be elicited by a very sensitive microphone placed in the external ear canal and an analysis by a computer. Sound produced by outer hair cells travels in a reverse direction: Outer hair cells-basilar membrane- perilymph- oval window- ossicles- tympanic membrane- ear canal. Otoacoustic emissions arise from the outer hair cells. Otoacoustic emissions (OAE) are objective, non-invasive and rapid measures used in determining cochlear outer hair cell function. OAE are inaudible sounds that are a byproduct of the biomechanical motility of the outer hair cells.', 'role': 'assistant'}]