The basilar membrane supports the organ of corti, which is the size of a green pea and works to translate vibrations into nerve impulses. It features hair cells with stiff microvilli on their surface; they are coated in the tectorial membrane, another jelly-like substance that assists in the process of hearing. These hair cells (along with other cells known as supporting cells) work to adjust the cochlea to different sound frequencies, helping the ear to process sounds more efficiently and accurately.

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