Question

Regarding the Ear and hearing in Humans, Identify the correct statement(s).

• 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

The correct option is A

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

Regarding the statements; Only A is correct and others are incorrect. Corrections in the other statements are :

B. The ear is most sensitive to frequencies between 1 kHz and 3kHz

C. The endolymph is not an ultrafiltrate of plasma but more similar to the intracellular fluid. It is rich in potassium and low in sodium

D. Defects in the sound conducting structures and the vestibulocochlear nerve i.e. the auditory nerve results in sensorineural hearing loss. Defects in the sound conducting structures alone i.e. structures of the external ear is responsible for conductive hearing loss.