Question

select all that apply
what are three characteristics of paranasal sinuses?
they reduce the weight of the skull.
they are connected to the cranial cavity.
they increase the intensity of the voice.
they are air - filled cavities.
they house the receptors responsible for the sense of smell

Explanation:

Paranasal sinuses are air - filled cavities in the skull. They reduce the weight of the skull and increase the intensity of the voice. The receptors for smell are in the olfactory epithelium, not in the paranasal sinuses, and they are not directly connected to the cranial cavity.

Answer:

They reduce the weight of the skull., They increase the intensity of the voice., They are air - filled cavities.