AP PSYCHOLOGY

Detailed explanation-1: -The stapes pushes in and out against a structure called the oval window . This action is passed onto the cochlea, a fluid-filled snail-like structure that contains the organ of Corti, the organ for hearing.

Detailed explanation-2: -The cochlea is filled with a watery liquid, the endolymph, which moves in response to the vibrations coming from the middle ear via the oval window.

Detailed explanation-3: -The cochlea is filled with fluid to help facilitate the hair cells of the cochlea registering vibrations and converting them to sound. The hair cells are not actual hair but are cells with hairlike extensions that float in the fluid of the cochlea.

Detailed explanation-4: -The entire inner ear is bathed in a cushioning fluid, called the endolymph when it lies within the membranous labyrinth and the perilymph when it separates the bony and membranous labyrinths.