The opening in the nasopharynx, that permits air pressure on both sides of tympanic membrane of the ear to be kept equal, is

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Tube of cochlea

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Auditory nerve

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Eustachian tube

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Solution

The correct option is D Eustachian tube
The eustachian tube is a canal, which connects the middle ear to the nasopharynx, which consists of the upper throat and the back of the nasal cavity. It regulates the pressure within the middle ear, equalizing it with the air pressure outside the body.

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Similar questions

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} C o l u m n I & C o l u m n I I i . P i n n a & a . C o l l e c t s s o u n d i i . C o c h l e a & b . R e g i o n b e t w e e n p i n n a a n d e a r d r u m i i i . A u d i t o r y c a n a l & c . T r a n s f e r s v i b r a t i o n s t o e a r o s s i c l e s i v . T y m p a n i c m e m b r a n e & d . T r a n s l a t e s s o u n d t o n e r v e i m p u l s e s v . E u s t a c h i a n t u b e & e . E q u a l i s e s p r e s s u r e b e t w e e n t h e i n n e r a n d o u t e r e a r \end{matrix}

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}

Structure in the ear responsible for maintaining equal pressure on both sides of the eardrum.

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