Multiple Choice
Which of the following statements concerning the eustachian tube is true?
A) It is responsible for the production of cerumen.
B) It remains open except when swallowing or yawning.
C) It allows passage of air between the middle and outer ear.
D) It helps equalize air pressure on both sides of the tympanic membrane.
Correct Answer:
Verified
Correct Answer:
Verified
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