Lung Toxicology Problem Set

Problem 4: Lung development

Correct!

When do the alveoli develop in lungs in humans?

A.	during the first 1-2 years of life Human lungs are not completely developed at birth. The development of the alveoli continues after birth. New alveoli form by a process called septation. The existing alveoli grow new septa, or walls, leading to increased surface area.
B.	in the 1-5th week of pregnancy
C.	between 3 and 5 years of age
D.	during the last 6 weeks of pregnancy
E.	continually throughout a person's lifetime