When used to determine functional residual capacity, the body plethysmograph operates on which of the following physical principles?

a. Dalton's law
b. Charles' law
c. Boyle's law
d. Gay-Lussac's law

ANS: C
The plethysmography technique applies Boyle's law and uses measurements of volume and pres-sure changes to determine lung volume, assuming temperature is constant.

Health Professions

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A sudden disruption of pulmonary perfusion caused by a blood clot is known as:

A) pulmonary occlusion. B) pulmonary diffusion. C) pulmonary edema. D) pulmonary embolism.

Health Professions

An increase in airway resistance during pressure-targeted ventilation will have which of the fol-lowing effects?

a. Volume decrease b. Flow increase c. Pressure increase d. Rate decrease

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