When studying the pulmonary ventilation values, the reduction of forced expiratory volume has been detected. What is the likely cause of this phenomenon?

Answer options

1. Obstructive pulmonary disease
2. Increase of pulmonary residual volume
3. Increase of respiratory volume
4. Increase of functional residual lung capacity
5. Increase of inspiratory reserve volume

Explanation

The obstructive pulmonary disease occurs due to obstruction of air pathways, causing difficult exhalation, leading to the reduction of forced expiratory volume.