Question

which upper respiratory structure prevents ingested materials from entering the nasal cavity?
a.) pharynx
b.) meatus
c.) uvula
d.) nasal conchae

Explanation:

The uvula is a fleshy, teardrop - shaped structure that hangs down from the soft palate. When we swallow, the uvula moves upward to help close off the nasopharynx (the part of the pharynx that is connected to the nasal cavity). This action prevents food, drink, and other ingested materials from entering the nasal cavity.

• The pharynx is a common passage for both air (respiratory) and food (digestive). It does not specifically prevent ingested materials from entering the nasal cavity.
• The meatus is a passage in the nasal cavity itself.
• The nasal conchae are structures in the nasal cavity that help with filtering, warming, and humidifying the air we breathe. They do not play a role in preventing ingested materials from entering the nasal cavity.

Answer:

c. Uvula