Question

consider the following step in the auditory pathway: the fluid inside the cochlea moves. identify the steps that occur immediately before this step. select the two that apply. answer 2 points sound waves travel down the auditory canal. the stapes presses into the oval window. sound waves hit the tympanic membrane. the incus movement causes the stapes to move.

Explanation:

In the auditory pathway, sound waves first travel down the auditory canal and hit the tympanic membrane. The movement of the tympanic membrane causes the movement of the ossicles (malleus, incus, stapes). The movement of the incus causes the stapes to move, and then the stapes presses into the oval window. This action causes the fluid inside the cochlea to move. So the two steps immediately before the fluid in the cochlea moves are the incus - movement causing the stapes to move and the stapes pressing into the oval window.

Answer:

The incus movement causes the stapes to move, The stapes presses into the oval window