The site of nerve impulse for hearing originates from

Ear drum

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Ear ossicles

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Cochlea

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Auditory nerve

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Solution

The correct option is C
Cochlea

The inner ear contains the sensory organs for hearing and balance. The nerve impulses are sent out to the brain by the cochlear portion of the auditory nerve.

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Q. The site from where the nerve impulse for hearing originates in mammals is

Match the following parts of the ear with their functions.

$\begin{matrix} P a r t s o f t h e e a r & F u n c t i o n s 1. P i n n a & A . V i b r a t e s a n d t r a n s m i t s s o u n d w a v e s t o t h e o s s i c l e s 2. T y m p a n u m & B . S e n d s t h e a u d i o i m p u l s e s t o t h e c e r e b r u m 3. E a r o s s i c l e s & C . C o l l e c t s s o u n d a n d d i r e c t s i t i n t o t h e e a r 4. A u d i t o r y n e r v e & D . A m p l i f i e s a n d t r a n s m i t s t h e s o u n d t o c o c h l e a \end{matrix}$

Q. Assertion :Auditory ossicles are small bones present in the cavity of inner ear. Reason: Auditory ossicles maintain the balance of air pressure between two sides of ear drum.

Q. Match column I with column II and select the correct option from the given codes.

Column I	Column II
A. Pinna	(i) Collects vibrations in the air which produces sound
B. Ear canal	(ii) Passage for sound wave from pinna to ear drum
C. Tympanic membrane	(iii) Transfers sound wave to ear ossicles
D. Ear ossicles	(iv) Increases the efficiency of transmission of sound waves to the inner ear
E. Cochlea	(v) Has hearing receptors
F. Eustachian tube	(vi) Equalises the pressure on both sides of ear drum
G. Auditory nerves	(vii) Impulse transfer from organ of Corti to auditory cortex in temporal lobe of cerebrum

The nerve which originate from the brain and goes to the ears for hearing is

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The site of nerve impulse for hearing originates from

The correct option is C Cochlea The inner ear contains the sensory organs for hearing and balance. The nerve impulses are sent out to the brain by the cochlear portion of the auditory nerve.

The correct option is C
Cochlea

The inner ear contains the sensory organs for hearing and balance. The nerve impulses are sent out to the brain by the cochlear portion of the auditory nerve.