In hearing, which structure is vibrated last?
A)The basilar membrane.
B)The perilymph inside the scalae.
C)The stapes.
D)The tympanic membrane.

Question

Quizplus · Accepted Answer

The basilar membrane is the structure that is vibrated last in hearing. Sound waves cause the tympanic membrane to vibrate, which in turn causes the ossicles to vibrate. The vibrations of the ossicles move the oval window, which causes the perilymph inside the scala vestibuli to vibrate. This vibration causes a traveling wave to form along the basilar membrane, which causes the hair cells to bend and send signals to the brain. Therefore, the basilar membrane is the final structure to vibrate before sound is perceived.

In Hearing, Which Structure Is Vibrated Last