Question

which of the following best describes what alveoli are?
a. they are the smallest tubes in the respiratory system.
b. they have a small amount of surface area.
c. they are found on the end of bronchioles.
d. they are comprised of millions of cells.
please select the best answer from the choices provided.
a
b
c
d

Explanation:

• Option A: The smallest tubes in the respiratory system are bronchioles, not alveoli.
• Option B: Alveoli have a large surface area to facilitate gas exchange, not a small amount.
• Option C: Alveoli are indeed found at the end of bronchioles. This is a correct anatomical location.
• Option D: Alveoli are made of a single - layer of cells (simple squamous epithelium), not millions of cells.

Answer:

C. They are found on the end of bronchioles.