Question

how does the pinna help transfer sounds from the ear to the brain?

a. it carries the impulses to the brain stem.

b. it catches the sound waves in the auditory canal.

c. it vibrates when the sound waves strike the eardrum.

d. it transmits vibration through the eardrum.

Explanation:

The pinna is the visible part of the ear and its main function is to catch sound - waves and funnel them into the auditory canal. Option A is incorrect as it is the auditory nerve that carries impulses to the brain - stem. Option C is about the eardrum's action, not the pinna's. Option D is also related to the eardrum's function in transmitting vibrations.

Answer:

B. It catches the sound waves in the auditory canal.