Question

A person with a tidal volume of 450 mL (milliliters), a vital capacity of 4000 mL, and a residual volume of 1000 mL would have a potential total lung capacity of _____. a. 4000 mL b. 5000 mL c. 1450 mL d. 4450 mL

Answer 1

Option B

Step-by-step explanation:

The total lung capacity (TLC) is the maximum volume of air that can be filled with in the lungs of an organism

The general formula for total lung capacity is

`TLC = TV + IRV + ERV + RV`

Where ,

TV is tidal volume

IRV is inspiratory reserve volume

ERV is expiratory reserve volume

And RV is Residual volume

Vital capacity (VC) is given by

`VC = TV + IRV + ERV`

However, by thumb rule vital capacity is 80% of the total lung capacity

Thus,
`(80)/(100) * TLC = 4000\\TLC = 4000 * (100)/(80)\\TLC = 5000`

Hence, option B is correct