Question

The residual volume can be measured directly with: Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a digital spirometer b wet spirometer c both digital and wet spirometers d it can not be measured directly

Answer 1

The residual volume can not be measured directly.

How is residual volume measured?

Residual volume is known to be measured by what we call a gas dilution test.

Note that this test often  measures how the concentration of the gases in the container changes.

What is residual volume?

This is known to be the Volume of air that is left over after a FORCED EXPIRATION. Note that it is one that cannot be measured by a spirometer.

Hence, The residual volume can not be measured directly.

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