When Flying, People Can Sense a "Popping" in Their Ears

question 1

Multiple Choice

When flying, people can sense a "popping" in their ears. This occurs because the:

• A) eustachian tubes open to release the pressure in the middle ear.
• B) eustachian tubes are dysfunctional.
• C) tympanic membrane vibrations increase in response to pressure changes.
• D) middle ear pressure is being sent through the oval window to the inner ear.