Question

question 9 of 10
in the cochlea:

a. sound is made either louder or softer

b. sound vibrations are converted to nerve impulses

c. the visual image is projected

d. sight occurs

Explanation:

• Option A: The cochlea is not responsible for adjusting the loudness of sound; structures like the middle ear (e.g., the ossicles) can amplify sound, but the cochlea's main role is transduction, not volume adjustment.
• Option B: The cochlea is part of the inner ear and contains hair cells that convert sound vibrations (mechanical energy) into nerve impulses (electrical signals) that are sent to the brain. This is the correct function of the cochlea.
• Option C: Visual image projection occurs in the eye (specifically the retina and visual cortex), not the cochlea (which is for hearing).
• Option D: Sight occurs in the visual system (eyes, optic nerve, visual cortex), while the cochlea is involved in hearing, so this is incorrect.

Answer:

B. sound vibrations are converted to nerve impulses