QUESTIONS AND COMPLETE SOLUTIONS
2026
◉ All of the following can be measured via spirometry EXCEPT:
- tidal volume (TV)
- vital capacity (VC)
- functional residual capacity (FRC)
- inspiratory capacity (IC)
- expiratory reserve volume (ERV). Answer: functional residual
capacity (FRC)
◉ Which of the following is a muscle that is used for expiration?
- sternocleidomastoid
- external obliques
- diaphragm
- external intercostals
- scalenus. Answer: external obliques
◉ What is the Transpulmonary pressure (PTP) if pleural pressure is
-7 cm H2O and alveolar pressure is -3 cm H2O?
- +10 cm H2O
, - +4 cm H2O
- -10 cm H2O
- -4 cm H2O
- 0 cm H2O. Answer: +4 cm H2O
-3 + -7
◉ A lung compliance test indicates that a 3 cm H2O change in
transpulmonary pressure generates a 0.9 liter change in lung
volume. What is this patient's lung compliance?
- 0.2 liters of air/cm H2O
- 0.2 cm H2O/liter of air
- 3.33 cm H2O/liter of air
- 0.3 liters of air/cm H2O
- 2.7 liters of air/cm H2O. Answer: 0.3 liters of air/cm H2O
◉ Airway resistance across a set of airways is lowest under which of
the following conditions?
- airway radius is large and the length of the tube is large
- airway radius is large and the length of the tube is small
- airway radius is small and airways are in series.
- airway radius is small and airways are in parallel.