Which statement(s)about the functions of the paranasal sinuses is/are true?
A)They provide an extensive area of mucous epithelium.
B)They make skull bones lighter.
C)The mucus they secrete enters the nasal cavities.
D)They support cilia that move the mucus.
E)All of the answers are correct.

Question

Quizplus · Accepted Answer

All of the statements are true. The extensive mucous epithelium and cilia in the paranasal sinuses helps to moisten and filter the air we breathe. The sinuses also make the skull bones lighter, which may aid in support of the head and in generating sound resonance. The mucus secreted by the sinuses enters the nasal cavities and drains into the pharynx, where it is swallowed or expelled.

Which Statement(s)about the Functions of the Paranasal Sinuses Is/are True