Which of the following is true about the ear-Eustachian tube equalizes the air pressure outside the ear-Auditory impulses are transmitted to the brain via auditory nerves-Eardrum collects the sound waves and sends them to the inner ear-Vestibular apparatus ensures that we maintain our body balance-

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Biology

External and Middle Ear

Which of the ...

Question

Which of the following is true about the ear?

Eustachian tube equalizes the air pressure outside the ear.

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Auditory impulses are transmitted to the brain via auditory nerves.

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Eardrum collects the sound waves and sends them to the inner ear.

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Vestibular apparatus ensures that we maintain our body balance.

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Solution

The correct options are
B Auditory impulses are transmitted to the brain via auditory nerves.
D Vestibular apparatus ensures that we maintain our body balance.
Pinna collects the sound waves from the environment and conducts it through the external auditory canal towards the eardrum. The eustachian tube equalizes air pressure inside the ear to match the normal air pressure allowing the sound to vibrate freely. This vibration causes the fluid inside the cochlea to vibrate. Due to which the sensory hair cells are stimulated. They generate auditory impulses which are transmitted to the brain by the auditory nerves. Apart from hearing, our ears ensure that we maintain our body balance with the help of vestibular apparatus.

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Similar questions

Q. The part of the ear that transmits sound vibrations to the brain is the
(a) cochlea.
(b) stirrup.
(c) eardrum.
(d) auditory nerve.

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

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. 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 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.
(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?

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