Cough Reflex Test 2025 – 400 Free Practice Questions to Pass the Exam

To determine the total volume calculation, you need to add the relevant lung volumes together based on the information provided. The vital capacity (VC) is the maximum amount of air that can be exhaled after a maximum inhalation. The functional residual capacity (FRC) is the amount of air remaining in the lungs after a normal exhalation. The expiratory reserve volume (ERV) is the additional amount of air that can be exhaled after a normal expiration.

In this case, the FRC is comprised of both the residual volume (RV) and the expiratory reserve volume (ERV). To find the total lung capacity (TLC), you would typically use the formula:

TLC = VC + FRC.

However, since the FRC already represents the volume remaining after a normal exhalation, and knowing that the volume of air a person can exhale after a deep breath (VC) is separate from the volume that remains after normal exhalation, you can express the total volume as:

Total Volume = VC + FRC - ERV.

Inserting the values provided:

- VC = 3600 mL

- FRC = 6000 mL

- ERV = 1000 mL