In emphysema,
A) pressure in alveoli increases and their walls burst, coalescing them and decreasing the surface area for gas exchange.
B) cells in the bronchial lining divide too fast.
C) tar from cigarettes blackens alveoli.
D) membranes form within alveoli, increasing surface area.

Question

Quizplus · Accepted Answer

Emphysema is a condition in which the walls of alveoli in the lungs are damaged, causing them to lose their elasticity. Due to this, the pressure in the alveoli increases and their walls may burst, coalescing them and decreasing the surface area available for gas exchange. This leads to breathlessness and difficulty in getting enough oxygen into the body.

In Emphysema