Question

question 6
3 pts
watch this video to learn more about how the structures of the ear convert sound waves into a neural signal by moving the \hairs,\ or stereocilia, of the cochlear duct. specific locations along the length of the duct encode specific frequencies, or pitches. the brain interprets the meaning of the sounds we hear as music, speech, noise, etc. which ear structures are responsible for the amplification and transfer of sound from the external ear to the inner ear?
the ossicles
ear wax
tympanic membrane
stapes

question 7
3 pts
watch this animation to learn more about the inner ear and to see the cochlea unroll, with the base at the back of the image and the apex at the front. specific wavelengths of sound cause specific regions of the basilar membrane to vibrate, much like the keys of a piano produce sound at different frequencies. based on the animation, where do frequencies—from high to low pitches—cause activity in the hair cells within the cochlear duct?
the base of the cochlea
the apex of the cochlea
basilar membrane
between the base and the apex of the cochlea

Explanation:

Question 6

The ossicles (malleus, incus, and stapes) are the three small bones in the middle ear. They amplify sound vibrations from the tympanic membrane and transfer them to the inner ear. The tympanic membrane (eardrum) vibrates in response to sound but does not amplify. Ear wax (cerumen) protects the ear canal. The stapes is just one of the ossicles (not all three).

High - pitched sounds cause vibrations near the base of the cochlea, and low - pitched sounds near the apex. The basilar membrane is the structure that vibrates, but the question asks about location from high to low. "Between the base and apex" is too vague. The apex is for low, the base for high.

Answer:

The ossicles

Question 7