___ helps in equalizing the pressures on either sides of the ear drum.

Oval window

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Tympanic membrane

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Eustachian tube

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Pinna

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Solution

The correct option is C
Eustachian tube

Eustachian tube is a canal that connects the middle ear to the nasopharynx, which consists of the upper throat and the back of the nasal cavity. It controls the pressure within the middle ear, making it equal with the air pressure outside the body.

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Similar questions

	Column I		Column II
(a)	Cochlea	(i)	Ends at the oval window
(b)	Scala vestibuli	(ii)	Coiled part of inner ear
(c)	Organ of Corti	(iii)	Equalizes the pressure on either sides of the ear drum
(d)	Eustachian tube	(iv)	Located on the basilar membrane

The ______ helps in equalising the pressures on either sides of the ear drum.

Consider the following statements.

i) Ears help our brain to sense from which directions the sounds are coming.

ii) Eustachian tubes equalize the air pressure on either side of the eardrum.

Match the following parts of the ear with functions

\begin{matrix} C o l u m n I & C o l u m n I I i . Pinna & a . Collects vibrations in the air i i . Cochlea & b . Region between pinna and eardrum i i i . Meatus & c . Transfers vibrations to ear ossicles i v . Tympanic membrane & d . Translates sound to nerve impulses v . Eustachian tube & e . Equalises pressure between the inner and outer ear \end{matrix}

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