Which of the Following Statements Are True of the Paranasal

question 6

Multiple Choice

Which of the following statements are true of the paranasal sinuses (Select all that apply) ?

• A)They are lined with simple squamous epithelium that is smooth to prevent friction.
• B)They are air cavities in the frontal and parietal bones.
• C)If they fill with mucus,they may become painful.
• D)An upper respiratory pathogen may infect these sinuses.
• E)They make the skull lighter in weight.
• F)They provide more air to vibrate when we speak.

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