Chemicals & Human Health

Lung Toxicology Problem Set

Problem 3: Lung function

One of the primary functions of the alveoli is to create a large surface area in the lungs. Why is a large surface are so important?

A. for energy storage
B. to remove toxins from the blood
C. to store oxygen for future use
D. for gas exchange
Gas exchange is the primary function of the lung. Gas exchange occurs by diffusion, thus the rate of gas exchange is dependent on surface area. The alveoli serve to provide a large surface area in the lungs.
E. for the Krebs cycle

The Southwest Environmental Health Sciences Center
The Biology Project
The University of Arizona
Tuesday, October 14, 1997
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