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Assertion:The inner ear contains three o...

Assertion:The inner ear contains three ossicles (malleus, incus and stapes) which are attached to one another in a chain-like fashion.
Reason:The stapes is attached to the tympanic membrane and the malleus is attached to the oval window of the cochlea.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
D
The middle ear contains three ossicles called malleus, incus and stapes which are attaced to one another in a chain-like fashion. The malleus is attaced to the tympanic membrane and the stapes is attached to the oval window of the cochlea. The car ossicles increase the efficiency of transmission of sound waves to the inner ear.
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Following is a list of the events (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 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 tectorical 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 ?