The figure below illustrates the organ of Corti, a part of the cochlea in the human inner ear.
What labeled region of this figure of the organ of Corti is directly stimulated to vibrate in response to the air movements caused by sound?

Question

The figure below illustrates the organ of Corti, a part of the cochlea in the human inner ear. 
What labeled region of this figure of the organ of Corti is directly stimulated to vibrate in response to the air movements caused by sound?

Quizplus · Accepted Answer

Region B, consisting of the hair cells, is directly stimulated by the movement of the tectorial membrane in response to the air movements caused by sound.

The Figure Below Illustrates the Organ of Corti, a Part