First slide

Disorders of the Respiratory System

Question

Emphysema is characterised by

Easy

A

Smaller alveoli; increased surface area for gas exchange
B

Smaller alveoli; decreased surface area for gas exchange
C

Larger alveoli; increased surface area for gas exchange
D

Larger alveoli; decreased surface area for gas exchange

Solution

In emphysema, alveolar walls are damaged due to the destruction of elastic fibres. This results in larger and fewer alveoli and the total surface area for gas exchange decreases. One major cause of emphysema is cigarette smoking.

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