As the Stapes Vibrates the Oval Window, Pressure Waves First

Question

As the stapes vibrates the oval window, pressure waves first begin
A) in the endolymph of the scala vestibuli.
B) in the endolymph of the scala tympani.
C) in the perilymph of the scala vestibuli.
D) in the perilymph of the scala tympani.
E) in the endolymph of the cochlear duct.

Accepted Answer

The stapes vibrating the oval window generates pressure waves in the perilymph of the scala vestibuli, as the scala vestibuli is filled with perilymph and is directly connected to the oval window.