Respiratory Air Flow and Volume

1. The predicted value for vital capacity (3.91 L) is higher than the experimental vital capacity (3.56 L). The predicted value for functional residual capacity (2.96L) is higher than the experimental value (2.54 L). The predicted value for total lung capacity(5.51) is higher than the experimental value (5.16). The differences can be caused by smoking, asthma and other lung deseases.

2. Inspiration mainly use muscular effert during quiet breathing. Expiration is largely passive because of the elastic recoil of the luna. Our group can relate this fact to the pattern we got of expiratory and inspiratory flow because in our experiment the expiration rate took longer than the inspiratory rate because expiration was passive. Expiration involves returning to the normal state.

3. Because the volunteer is unable to exhale any further, the residual volume can’t be determined by spirometry. Spirometry only measure what you’re breathing in and out.

4. The predicted value for Forced vital capacity (4.13L) is higher than the experimental value (3.32L). The predicted value for forced expired volume per 1 second (3.59L ) is higher than the experimental value (2.60 L). The predicted value for FEV1/FVC (87%) is higher than the experimental value( 78%). The differences can be caused by smoking, asthma or any other lung diseases.

5. It describes the effectiveness of how well an individual’s lungs can turn over its total volume in 1 second.

6. It is more or less the same but there is a difference. The forced breathing became less effective after each trail. But it stays almost the same because the person gets time in between trails to breath normal.

7. -Peak inspiratry flow
-Peak expiratry flow
-Forced vital capacity
-Forced expired volume in 1 second
All of the above were affected by the obstruction. The obstruction causes less