Which of the following statements are true of the paranasal sinuses? (Read carefully and select all of the correct statements.)
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.

Question

Quizplus · Accepted Answer

A) is incorrect because the lining of the paranasal sinuses is not simple squamous epithelium, but rather ciliated pseudostratified columnar epithelium. 
B) is incorrect because paranasal sinuses are located in several bones of the skull, including the frontal, ethmoid, sphenoid, and maxillary bones. 
C) is correct because if the sinuses fill with mucus, there can be pressure and pain due to the buildup of fluid. 
D) is correct because upper respiratory pathogens, such as viruses or bacteria, can infect the paranasal sinuses. 
E) is correct because the paranasal sinuses make the skull lighter by reducing its weight. 
F) is correct because the sinuses provide additional resonating chambers for sound, which can enhance the quality of the voice.

Which of the Following Statements Are True of the Paranasal