Question

question 6
1 pts
paranasal sinuses are normally filled with:
bone marrow.
a serous fluid.
mucus.
air.
question 7
1 pts
which of the following is not lined with a ciliated mucous membrane?
vestibule
posterior nares
trachea
primary bronchi
question 8
1 pts
the small, leaf - shaped cartilage behind the tongue and hyoid bone is the:
cricoid cartilage.
thyroid cartilage.
corniculate cartilage.
epiglottis.

Explanation:

• Question 6: Paranasal sinuses are air - filled spaces in the skull bones. They are connected to the nasal cavity. Bone marrow is found in bones (not sinuses), serous fluid is in body cavities like the pleural cavity, and mucus is produced by mucous membranes (but sinuses are air - filled).
• Question 7: The vestibule of the nose is lined with skin (stratified squamous epithelium) with hair follicles. The posterior nares, trachea, and primary bronchi are lined with ciliated mucous membrane (pseudostratified ciliated columnar epithelium) which helps in trapping and moving particles.
• Question 8: The epiglottis is a leaf - shaped cartilage. The cricoid cartilage is a ring - shaped cartilage in the larynx, the thyroid cartilage is the Adam's apple (shield - shaped), and the corniculate cartilages are small conical cartilages.

Answer:

• Question 6: air
• Question 7: Vestibule
• Question 8: epiglottis