Which of the following statements accurately describes the measurement and inclusion of tidal volume in the inspiratory reserve volume (IRV) and expiratory reserve volume (ERV)?
Both IRV and ERV include the tidal volume in their measurement.
IRV includes the tidal volume, while ERV does not include the tidal volume.
ERV includes the tidal volume, while IRV does not include the tidal volume.
Neither IRV nor ERV includes the tidal volume in their measurement
The statement clarifies that both the inspiratory reserve volume (IRV) and expiratory reserve volume (ERV) are measured separately from the tidal volume. IRV is measured from the completed resting inspiration, while ERV is measured from the completed resting expiration. Therefore, neither IRV nor ERV includes the tidal volume in their measurement.
Option 4 is the correct answer.