Asthma is a lung disease triggered by the inhalation of an allergen such as pollen or dust. The allergen triggers;
● bronchi and bronchioles to become inflamed and narrow
● goblet cells lining these airways to secrete excess mucus.
Which effects will these responses have on the gaseous exchange system of a person with asthma?
1 decrease the diffusion gradient for oxygen in the lungs
2 increase the diffusion distance from the alveoli into the blood
3 increase the risk of developing a lung infection
1 )
1 and 2
1 and 3
3 )
2 and 3
4 )
3 only
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