Question

The volume of air involved in breathing movements but cannot be estimated by using a spirometer is

A. Tidal volume

B. Inspiratory reserve volume

C. Residual volume

D. Expiratory reserve volume​

Answer 1

Answer:

$\huge \underline\textbf{Residual volume!}$

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Answer 2

The volume of air involved in breathing movements but cannot be estimated by using a spirometer is C. Residual volume

• Among the following options only the tidal volume, Inspiratory reserve volume and expiratory reserve volume can be estimated using a spirometer.
• Residual volume cannot be estimated using a spirometer because the air from the lungs cannot be expelled completely so that is why there's no way of determining the value.
• Though the volume can't be measured directly but it can calculated by indirect methods.