Which is the hearing organ that turns sound vibrations into signals that get sent through the auditory nerves?

Which is the hearing organ that turns sound vibrations into signals that get sent through the auditory nerves?

• A. Inner ear
• B. Cataract
• C. Cerebral palsy
• D. Cochlea

Answer: (D)

The main idea is how sound is turned into nerve signals. The cochlea, a snail-shaped structure in the inner ear, is where this transduction happens. Sound vibrations travel through the ear and cause the fluid inside the cochlea to move. Inside the cochlea, hair cells on the organ of Corti bend in response to that motion. This bending opens ion channels, creating electrical signals that are picked up by the auditory nerve and carried to the brain for interpretation. That makes the cochlea the hearing organ responsible for turning sound vibrations into neural signals.

The inner ear includes more than just the cochlea, but the actual conversion of mechanical sound into neural activity occurs in the cochlea. The other options don’t fit: cataracts affect the eye’s lens and vision, and cerebral palsy is a brain–spinal condition that is not about hearing.