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Which one is correct regarding the ear and hearing? |
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a) |
The range of human hearing is from 20 Hz to 20 kHz |
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b) |
Conductive hearing loss would be evident if a person had a similar degree of hearing loss for air conduction and bone conduction |
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c) |
The ear is most sensitive to frequencies between about 100 Hz and 300 Hz |
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d) |
The endolymph of the scala media is similar in composition to plasma |
|
Which one is correct regarding the ear and hearing? |
|
|
a) |
The range of human hearing is from 20 Hz to 20 kHz |
|
b) |
Conductive hearing loss would be evident if a person had a similar degree of hearing loss for air conduction and bone conduction |
|
c) |
The ear is most sensitive to frequencies between about 100 Hz and 300 Hz |
|
d) |
The endolymph of the scala media is similar in composition to plasma |
(a)
If air conduction and bone conduction showed a similar degree of hearing loss, the subject would have sensorineural hearing loss. The ear is most sensitive to frequencies between 1 kHz and 3 kHz. The endolymph is not an ultrafiltrate of plasma but is rich in potassium and low in sodium.