Body plethysmography is based on which of the following gas laws?
a. Boyle's c. Dalton's
b. Charles' d. Gay-Lussac's
ANS: A
Body plethysmography measures mouth pressure and box pressure changes during tidal volume and panting. The microprocessor unit calculates the functional residual capacity from empirically derived pressure-volume relationships. It is Boyle's law that explains the relationship between gas volume and pressure when temperature is held constant.
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