Emphysema is a chronic obstructive pulmonary disease (COPD) that causes progressive destruction of alveoli (air sacs) in the lungs leading to a decreased ability to exhale.How does this disease affect carbon dioxide levels in the blood?
A) they are unaffected
B) they increase
C) they decrease
D) the result varies with each individual
E) first,they increase,then they decrease
Correct Answer:
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