Refer the following features and identify the correct part of the ear to which these are associated.
i. It is also called auditory tube.
ii. It connects the middle ear cavity with the pharynx.
iii. It helps in equalizing the pressures on either sides of the ear drum.
Eustachian tube
— Concept: This question tests your knowledge of the structure and function of the human ear, specifically focusing on…Concept: This question tests your knowledge of the structure and function of the human ear, specifically focusing on the role of the Eustachian tube.
Why (B) is correct: The features described (i. also called auditory tube, ii. connects the middle ear cavity with the pharynx, and iii. helps in equalizing pressures on either side of the eardrum) are all characteristic functions of the Eustachian tube. This tube is crucial for maintaining proper hearing by balancing air pressure.
Why other options are wrong:
(A) Ear ossicles: These are three small bones (malleus, incus, stapes) in the middle ear that transmit sound vibrations, not equalize pressure.
(C) Semicircular canal: These are part of the inner ear involved in maintaining body balance and detecting rotational movements, not pressure equalization.
(D) Vestibular apparatus: This is a complex structure in the inner ear (including semicircular canals and otolith organs) responsible for balance and posture, not connecting to the pharynx or equalizing pressure.
NEET Tip: Remember that the Eustachian tube is vital for preventing discomfort and hearing impairment due to pressure differences, especially during changes in altitude.
Correct Answer: (B)
Eustachian tube