Final answer:
The statement is true; the air is indeed warmed and humidified as it passes through the nasal cavity and over the nasal conchae, with the help of the mucosa-lined paranasal sinuses.
Step-by-step explanation:
The statement that air passing over nasal conchae is altered via temperature and humidity is true. When air enters the body through the nasal cavity, it comes into contact with the nasal conchae—curved bony plates—that help to warm and moisturize the air.
The conchae, lined with mucosa, increase surface area to maximize warming and humidification, and mucus in this area traps particulate matter, while cilia help to move it out of the nasal passages. Additionally, the presence of the paranasal sinuses, which are air-filled spaces within the bones of the nasal cavity, contribute to this process. These sinuses are also lined with mucosa that helps to warm and humidify incoming air, as well as lighten the skull and produce mucus.