Question

High frequency sound waves vibrate basilar membrane

• A. Near helicotrema
• B. In middle of cochlea
• C. From oval window to helicotrema
• D. Near oval window

Answer 1

The correct option is D Near oval window

When sound waves from the environment enter the external ear, they are directed to ear drum (tympanic membrane). The ear drum vibrates on receiving sound waves and the vibrations are sent to oval window through ear ossicles which are malleus, incus and stapes. From the oval window, these vibrations are passed onto fluid of cochlea where waves are generated into lymph due to these vibrations. These waves generate vibrations in the basilar membrane which bend the hair cells and press them against the tectorial membrane. Hence, vibrations in basilar membrane are generated near oval window.

So, the correct answer is 'Near oval window'.