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  •         Following is a list of the event (in a random order) that lead to the formation of an auditory impulse. (i) Vibration is transferred from the malleus

        Following is a list of the event (in a random order) that lead to the formation of an auditory impulse.

(i) Vibration is transferred from the malleus to the incus to the stapes.

(ii) Basilar membrane moves up and down.

(iii) Nerve impulse is transmitted in cochlear nerve to the auditory cortex of brain for impulse analysis and recognitions.

(iv) Sound waves pass through ear canal

(v) Stereocilia of hair cells of organ of corti rub against tectorial membrane.

(vi) Sound waves cause ear drum to vibrate.

(vii) Nerve impulse is generated.

(viii) Vibrations move from fluid of vestibular canal to the fluid of tympanic canal.

(ix) Membrane at oval window vibrates.

Which of the following options represents these events in a correct order?

Option: 1

(iv), (vi), (i), (ix), (viii), (ii), (v), (vii), (iii)


Option: 2

(i), (ii), (iii), (iv), (v), (vi), (vii), (viii), (ix)


Option: 3

(ix), (viii), (vii), (vi), (v), (iv), (iii), (ii), (i)


Option: 4

(iv), (vi), (i), (viii), (ix), (ii), (v), (vii), (iii)


Answers (1)

best_answer

Mechanism of Hearing -

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

- wherein

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.
 

 

 Correct option is 1

 

Posted by

HARSH KANKARIA

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