10 Questions
What is the approximate value of Inspiratory Reserve Volume (IRV) in a normal adult?
Around 3,000 mL
What is the functional residual capacity (FRC) in terms of other lung volumes?
FRC = ERV + RV
What is the total lung capacity (TLC) in terms of other lung volumes?
TLC = VC + RV
What is the Vital Capacity (VC) in terms of other lung volumes?
VC = TV + IRV + ERV
What is Tidal Volume (TV)?
The volume of air inspired or expired during a normal breath
What does Residual Volume (RV) represent?
The volume of air remaining in the lungs after a maximal expiration
What does Expiratory Reserve Volume (ERV) represent?
The maximum volume of air that can be expired after a normal tidal expiration
What is the Derived Measure Vital Capacity (VC)?
The maximum volume of air that can be moved in or out during a single respiratory cycle
What is Functional Residual Capacity (FRC)?
The volume of air remaining in the lungs at the end of a normal tidal expiration. It is the sum of Expiratory Reserve Volume (ERV) and Residual Volume (RV)
How is Total Lung Capacity (TLC) calculated?
TLC = VC + RV
Study Notes
Lung Volumes
- Inspiratory Reserve Volume (IRV) is approximately 3000 mL in a normal adult.
Functional Residual Capacity (FRC)
- FRC is the sum of Expiratory Reserve Volume (ERV) and Residual Volume (RV).
Total Lung Capacity (TLC)
- TLC is the sum of Vital Capacity (VC) and Residual Volume (RV).
- TLC is calculated by adding Inspiratory Reserve Volume (IRV), Tidal Volume (TV), Expiratory Reserve Volume (ERV), and Residual Volume (RV).
Vital Capacity (VC)
- VC is the sum of Inspiratory Reserve Volume (IRV), Tidal Volume (TV), and Expiratory Reserve Volume (ERV).
Tidal Volume (TV)
- Tidal Volume (TV) is the volume of air inhaled and exhaled during a normal breathing cycle.
Residual Volume (RV)
- Residual Volume (RV) represents the volume of air remaining in the lungs after a maximal exhalation.
Expiratory Reserve Volume (ERV)
- Expiratory Reserve Volume (ERV) represents the volume of air that can be exhaled forcefully after a normal exhalation.
Derived Measures
- Vital Capacity (VC) is a derived measure that can be calculated from other lung volumes.
- Functional Residual Capacity (FRC) is a derived measure that can be calculated from other lung volumes.
Learn about the basic measures of lung volume such as Tidal Volume and Inspiratory Reserve Volume, along with their approximate values in a normal adult. This quiz covers the definitions and typical values for these important respiratory parameters.
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