Which of the Following Is True About Paranasal Sinuses

question 83

Multiple Choice

Which of the following is true about paranasal sinuses?

• A) Paranasal sinuses enhance the resonance of the voice and lighten the skull.
• B) Paranasal sinuses contain passages acting as one- way valves.
• C) Paranasal sinuses are found in maxillary, ethmoid, and lacrimal bones.
• D) Paranasal sinuses open into the oral cavity.

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