Sound waves are collected by the outer ear and channeled down the auditory canal. Describe the major structures of the ear and describe the role each plays in the process of hearing
What will be an ideal response?
Answer: A good answer will include the following key points.
? A sound wave enters the outer ear and strikes the eardrum causing it to vibrate.
? This vibration is passed along to three tiny bones in the middle ear called the ossicles.
? The innermost bone transfers the vibrations to the fluid-filled cochlea of the inner ear.
? The hair cells on the basilar membrane in the cochlea back and forth as the fluid in the cochlea moves.
? This causes the hair cells to initiate a signal that is passed along to the auditory nerve, which carries the signal to the brain.
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