Where do the conchae cause air to be turbulent to clean the air and warm humidify it?

• A. In The Vestibular Zone
• B. In The Respiratory Zone
• C. In The Nasopharynx
• D. In The Olfactory Zone

Answer: (D)

Air is conditioned as it passes through the nasal cavity, where the conchae create turbulent airflow. That turbulence increases the surface area of contact between air and the moist mucous lining, allowing trapped particles to be filtered and the air to be warmed and humidified before it moves deeper into the respiratory tract.

The olfactory zone sits at the roof of the nasal cavity and contains the smell receptors; its role is smell, not conditioning the air. The nasopharynx is the next region after the nasal cavity, but the key turbulent conditioning happens earlier, in the nasal cavity's respiratory area around the turbinates.