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Home  >>  JEEMAIN and AIPMT  >>  Biology  >>  Human Physiology
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Regarding mechanism of hearing - choose the incorrect option :


( A ) The vibrations are passed on to the fluid of the cochlea, where they generate waves in the lymphs.
( B ) The waves in the lymphs induce a ripple in the basilar membrane and these movements of the basilar membrane bend the hair cells, pressing them against the tectorial membrane.
( C ) The ear drum vibrates in response to the sound waves and these vibrations are transmitted through the ear ossicles to the round window.
( D ) The movements of the basilar membrane bend the hair cells, pressing them against the tectorial membrane, due to which nerve impulses are generated in the associated afferent neurons
Can you answer this question?
 
 

1 Answer

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(C) is the right answer.

The external ear receives sound waves and directs them to the ear drum. The ear drum vibrates in response to the sound waves and these vibrations are transmitted through the ear ossicles (malleus, incus and stapes) to the oval window. The vibrations are passed through the oval window on to the fluid of the cochlea, where they generate waves in the lymphs. The waves in the lymphs induce a ripple in the basilar membrane. These movements of the basilar membrane bend the hair cells, pressing them against the tectorial membrane. As a result, nerve impulses are generated in the associated afferent neurons. These impulses are transmitted by the afferent fibres via auditory nerves to the auditory cortex of the brain, where the impulses are analysed and the sound is recognised.
answered Apr 3, 2014 by pady_1
 

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