Question

Measures of lung function include forced expiratory volume (FEV) and functional vital capacity (FVC). Make a claim that identifies what conditions of the lungs would cause an increase in FEV1/FVC, and what would cause a decrease FEV1/FVC.

a) Increased lung compliance would cause an increase in FEV1/FVC, while decreased lung compliance would cause a decrease.
b) Increased lung compliance would cause a decrease in FEV1/FVC, while decreased lung compliance would cause an increase.
c) Increased airway resistance would cause an increase in FEV1/FVC, while decreased airway resistance would cause a decrease.
d) Increased airway resistance would cause a decrease in FEV1/FVC, while decreased airway resistance would cause an increase.

Answer 1

Increased lung compliance would cause an increase in FEV1/FVC, while decreased lung compliance or increased airway resistance would cause a decrease FEV1/FVC.

Step-by-step explanation:

The FEV1/FVC ratio is used to diagnose lung diseases such as asthma, emphysema, and fibrosis. An increase in FEV1/FVC can be caused by increased lung compliance, meaning that the lungs are more pliable and able to bend properly. On the other hand, a decrease in FEV1/FVC can be caused by decreased lung compliance or increased airway resistance.