Question

1. the main function of the eustachian tube is to

a. maintain equal air pressure on the eardrum
b. conduct sound waves to the eardrum
c. maintain low air pressure in the inner ear
d. drain fluid from the middle ear
use the following graphic to answer question 51.
structures of the ear
1 semicircular canals
2 organ of corti
3 eustachian tube
4 tympanic membrane
5 auditory canal
6 ossicles

1. what pathway do sound waves take through the ear to be detected by the brain? record your four - digit answer in the spaces provided.

Explanation:

The Eustachian tube connects the middle - ear to the nasopharynx. Its main role is to equalize the air pressure on either side of the eardrum. For the sound - wave pathway, sound enters through the auditory canal, vibrates the tympanic membrane, moves the ossicles, and stimulates the organ of Corti.

Answer:

1. A. maintain equal air pressure on the eardrum
2. 5 4 6 2