Multiple Choice
What is the difference between tidal volume and vital capacity in the context of lung volumes?
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22. The Respiratory System
Lung Volumes and Capacities
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Which lung capacity is calculated by adding tidal volume and inspiratory reserve volume?
A
Inspiratory Capacity
B
Functional Residual Capacity
C
Total Lung Capacity
D
Vital Capacity
Verified step by step guidance1
Begin by understanding the different lung volumes and capacities. Lung volumes are the basic components, while lung capacities are combinations of these volumes.
Identify the tidal volume (TV), which is the amount of air inhaled or exhaled during normal breathing.
Recognize the inspiratory reserve volume (IRV), which is the additional air that can be inhaled after a normal inhalation.
To find the lung capacity that combines tidal volume and inspiratory reserve volume, add these two volumes together. This combination is known as the Inspiratory Capacity (IC).
Inspiratory Capacity (IC) is calculated using the formula: . This capacity represents the maximum amount of air that can be inhaled after a normal expiration.
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