A) vital capacity
B) functional residual capacity
C) forced expiratory volume
D) anatomic dead space
Correct Answer: D
Solution :
The portion of respiratory passage in which incoming and outgoing of air is completely locked is called anatomical dead space. This air is not utilized in gas exchange and can be claculated as \[TV\times \frac{C{{O}_{2}}%in\,alveolar\,air-C{{O}_{2}}%in\,expired\,air}{C{{O}_{2}}%\text{ }in\text{ }alveolar\text{ }air}\]
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