A boy has a tidal volume of 450 mL, an inspiratory reserve volume of 2800 mL, an expiratory reserve…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A boy has a tidal volume of mL, an inspiratory reserve volume of mL, an expiratory reserve volume of mL and a residual volume of mL.
- Find his inspiratory capacity.
- Find his expiratory capacity.
- Find his functional residual capacity.
- Find his vital capacity.
- Find his total lung capacity.
Need a reminder? The key ideaShow
, , , , . A spirometer cannot show the residual volume, because that air stays in the lungs.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Given. TV mL, IRV mL, ERV mL, RV mL.
Plan. Use the sums of the volumes.
Step 1. IC. mL.
Step 2. EC. mL.
Step 3. FRC. mL.
Step 4. VC. mL.
Step 5. TLC. mL.
Answer: mL; mL; mL; mL; mL.
Check. TLC is also IC + FRC mL, the same.
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