Question

By the stimulation of which structure of human ear, the sound waves are perceived by brain?

• A. Basilar membrane
• B. Tectorial membrane
• C. Reissner's membrane
• D. Sensory hair cells of organ of Corti

Answer 1

Answer: (D)

Sensory hair cells of organ of Corti

Sound waves enter the external auditory canal and cause the tympanic membrane to vibrate. These vibrations are amplified by ear ossicles and are transmitted through oval window to basilar membrane. Vibrations of basilar membrane stimulate the hair cells (mechanoreceptors) of the organ of Corti and nerve impulse is carried to brain. Thus, the correct answer is option D.