What is the formula to calculate Expiratory Reserve Volume (ERV)?
Respiratory Review 2025

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Biology
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University
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Hard
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1.
FLASHCARD QUESTION
Front
Back
ERV = Vital Capacity (VC) - Tidal Volume (TV) - Inspiratory Capacity (IC) - Functional Residual Capacity (FRC)
2.
FLASHCARD QUESTION
Front
Define Vital Capacity (VC).
Back
The maximum amount of air a person can exhale after maximum inhalation, typically measured in liters.
3.
FLASHCARD QUESTION
Front
What is Tidal Volume (TV)?
Back
The amount of air inhaled or exhaled during normal breathing, usually around 0.5 L.
4.
FLASHCARD QUESTION
Front
What does Inspiratory Capacity (IC) represent?
Back
The maximum amount of air that can be inhaled after a normal expiration, calculated as TV + Inspiratory Reserve Volume (IRV).
5.
FLASHCARD QUESTION
Front
Define Functional Residual Capacity (FRC).
Back
The volume of air remaining in the lungs after a normal expiration, calculated as ERV + RV.
6.
FLASHCARD QUESTION
Front
What is the significance of pleural pressure during respiration?
Back
Pleural pressure helps keep the lungs inflated and is most negative at the end of maximal inspiration.
7.
FLASHCARD QUESTION
Front
What triggers Hypoventilation?
Back
Low arterial PCO2 levels trigger hypoventilation, leading to decreased breathing rate.
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