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 causes 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 causes by sound?

Quizplus · Accepted Answer

Region B, the basilar membrane, is directly stimulated to vibrate in response to the air movements caused by sound. This vibration then triggers the hair cells in the organ of Corti to generate neural signals that are sent to the brain for processing.

The Figure Below Illustrates the Organ of Corti, a Part