A person with a residual respiratory volume of 750 mL, a tidal volume of 500 mL, and a total lung capacity of 4500 mL would have a vital capacity of
A)1250 mL.
B)3750 mL.
C)5000 mL.
D)4000 mL.
E)3250 mL.

Question

Quizplus · Accepted Answer

Vital capacity is the maximum amount of air that can be exhaled after a maximal inhalation. It is calculated by subtracting residual volume from total lung capacity. 
Thus, Vital Capacity = Total Lung Capacity - Residual Volume 
Vital Capacity = 4500 mL - 750 mL 
Vital Capacity = 3750 mL.

A Person with a Residual Respiratory Volume of 750 ML