This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Special Senses, Subject name: Physiology
[{'content': 'Depolarisation in hair cells of organ of coi occurs due to: \nSelect and explain. \nA. Movement of basilar membrane, B. Movement of taller stereocilia toward the smaller ones, C. Influx of Na+, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Depolarisation in hair cells of organ of coi occurs primarily due to movement of basilar membrane TIP LINK THEORY: When the shoer stereocilia are pushed toward the taller ones, the channel open time is increased. K+, the most abundant cation in endolymph, and Ca2+ enter the channel and induce depolarization. Mainly K+ influx in the hair cells causes depolarisation.', 'role': 'assistant'}]