The Eustachian tube connects the middle ear with which part of the body?
- A.Nasal cavity only
- B.Pharynx
- C.Larynx
- D.Oesophagus
Correct answer
Explanation
The correct answer is B, the pharynx. The Eustachian tube, also called the auditory tube, runs from the cavity of the middle ear to the nasopharynx, the upper part of the throat behind the nose, and its function is to keep the air pressure on the inner side of the eardrum equal to the pressure outside. This is why the ears feel blocked and then pop during the take-off or landing of an aircraft, and why swallowing or yawning relieves the feeling. Option A is wrong because the tube opens into the throat behind the nasal cavity rather than into the nasal cavity itself. Option C is wrong because the larynx is the voice box, which lies lower in the neck and is concerned with the production of sound. Option D is wrong because the oesophagus is the food pipe leading to the stomach and has no connection with the ear.
Read the full article: Sense Organs: Eye, Ear, Nose, Tongue and Skin
Practice Questions
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- A.Cornea
- B.Iris
- C.Retina
- D.Eye Lens
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The iris is the coloured ring in front of the lens, formed by the front part of the choroid, and the muscles in it widen or narrow the pupil so that the right amount of light reaches the retina; in dim light the pupil opens wide and in bright light…
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- A.Eyes
- B.Nose
- C.Tongue
- D.Skin
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Read the full explanation →Which is the smallest bone in the human body?
- A.Malleus
- B.Incus
- C.Stapes
- D.Nasal bone
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Read the full explanation →Which part of the ear is responsible for maintaining the balance of the body?
- A.Cochlea
- B.Semicircular canals
- C.Tympanic membrane
- D.Eustachian tube
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Read the full explanation →The light sensitive layer of the human eye on which the image is formed is the:
- A.Cornea
- B.Choroid
- C.Sclera
- D.Retina
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The retina is the innermost coat of the eyeball and it carries the photoreceptor cells, the rods and the cones, which convert light into nerve impulses that the optic nerve carries to the brain; the image formed on the retina is real and inverted, and the brain interprets it as…
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