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Question

Which of the following is true about the ear?

A
Eustachian tube equalizes the air pressure outside the ear.
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B
Auditory impulses are transmitted to the brain via auditory nerves.
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C
Eardrum collects the sound waves and sends them to the inner ear.
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D
Vestibular apparatus ensures that we maintain our body balance.
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Solution

The correct option is 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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