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Cochlea and the Organ of Corti

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The fluid-filled cochlea houses the basilar membrane and the organ of Corti, where hair cells transduce fluid pressure waves into electrical signals via bending stereocilia.

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Bending stereocilia toward their tallest neighbor opens gated ion channels, depolarizing the hair cell.

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Inner hair cells, not the more numerous outer hair cells, carry most of the auditory information to the brain.