The role(s) of the sinuses include(s)
A) making the skull lighter.
B) production of mucus that moistens and cleans the air.
C) increasing surface area for gas exchange.
D) extra source of air and increasing surface area for gas exchange.
E) making the skull lighter and production of mucus that moistens and cleans the air.

Question

Quizplus · Accepted Answer

The sinuses have two roles - making the skull lighter and producing mucus that moistens and cleans the air. Therefore, the best choice is option E, which includes both roles. Option A only mentions one role, while option B and C describe the functions of the nasal cavity rather than the sinuses. Option D describes the role of air sacs in the lungs, not the sinuses.

The Role(s) of the Sinuses Include(s)