Question

question 15
the lower airways (alveoli, respiratory bronchioles) consist of ______ epithelial cells
a simple squamous
b transitional
c stratified squamous
d ciliated pseudostratified columnar

Explanation:

The lower airways(such as alveoli, respiratory bronchioles) need a thin layer of cells for efficient gas exchange. Simple squamous epithelial cells are thin and flat, which is ideal for this function. Transitional epithelium is for stretching (like in the bladder). Stratified squamous is for protection (like in the skin). Ciliated pseudostratified columnar is more in the upper airways for trapping and moving particles.

Answer:

A. Simple squamous