Depolarisation in hair cells of organ of coi occurs due to:: (A) Movement of basilar membrane, (B) Movement of taller stereocilia toward the smaller ones, (C) Influx of Na+, (D) None of the above
Answer is A. 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.