Question

Which of the following is true about the functions of the ear?

• A. The range of human hearing is from 20 Hz to 20 kHz
• B. The ear is most sensitive to frequencies between about 100 Hz and 300 Hz
• C. The endolymph of the scala media is similar in composition to plasma.
• D. Conductive hearing loss is loss of hearing due to defects in the sound conducting structures and due to defects in the vestibulocochlear nerve

Answer 1

Answer: (A), (B), (D)

The correct options are
A

The range of human hearing is from 20 Hz to 20 kHz

B

The ear is most sensitive to frequencies between about 100 Hz and 300 Hz

D

Conductive hearing loss is loss of hearing due to defects in the sound conducting structures and due to defects in the vestibulocochlear nerve

The pinna collects the sound and conducts them through the external auditory canal. The eustachian tube equalizes the air pressure on either side of the eardrum allowing it to vibrate freely. The organ of Corti contains the sensory cells responsible for hearing. Auditory impulses are transmitted to the brain by the auditory nerves.