 In many mammals the kinocilium will regress once the hair bundle has matured.The movement of the hair bundle, as a result of endolymph flow, will cause potassium channels on the stereocilia to open.This is mostly due to the pulling force stereocilia exerts on its neighboring stereocilia via interconnecting links that hold stereocilia together (usually from tallest to shortest) and this leads to the depolarization of the hair cell.