Question

question 27
the upper airways (trachea, bronchi) consist of ______ epithelial cells
a simple squamous
b transitional
c stratified squamous
d ciliated pseudostratified columnar

Explanation:

• Simple squamous epithelium is thin and allows for diffusion, not for the upper airways which need to trap particles.
• Transitional epithelium is for organs that stretch (like bladder), not relevant here.
• Stratified squamous is for areas with abrasion (like skin), not upper airways.
• Ciliated pseudostratified columnar epithelium has cilia that move mucus (with trapped particles) out of the upper airways (trachea, bronchi).

Answer:

D. Ciliated pseudostratified columnar