Eustachian tube is meant for

Amplifying sound waves

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To listen to activities in buccopharyngeal cavity

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Equalise pressure on the two sides of tympanum

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To keep the middle ear moist

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Solution

The correct option is D Equalise pressure on the two sides of tympanum
Eustachian tube is a canal that connects the middle ear with the pharynx. It maintains the pressure between the atmosphere and the middle ear. It also equalizes the pressure on both sides of tympanic membrane (ear drum). The tympanic membrane is composed of connective tissue and is covered with skin outside and mucous membrane inside.
So, the correct answer is 'Equalise pressure on the two sides of tympanum'.

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Similar questions

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.

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

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