What is normal amount of anatomic dead space found in a healthy lung?
a. 1 ml/kg predicted body weight
b. 2 ml/kg predicted body weight
c. 3 ml/kg predicted body weight
d. 4 ml/kg predicted body weight
ANS: B
These airways constitute the anatomic dead space of the respiratory system that is rebreathed with each breath. In the adult human, the volume filling the airways of the anatomic dead space is approximately 2 ml/kg of lean body weight, or approximately 150 ml in the typical adult.
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