How Do We Accomplish Forced (Active) Breathing

The video tutorial explains the differences between quiet and forced breathing, detailing the mechanics and muscles involved in each process. Quiet breathing involves minimal muscle use, primarily the diaphragm and external intercostals. In contrast, forced breathing, such as during exercise or medical tests, requires additional muscles to increase thoracic cavity size for inspiration and decrease it for expiration. The tutorial also introduces concepts like inspiratory and expiratory reserve volumes, which measure lung compliance and elasticity, respectively.

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Describe the impact of pulmonary fibrosis on breathing.

What is the expiratory reserve volume (ERV) and how does it differ from IRV?