Which of the following statements is true if metabolism increases?
a. PaCO2 will rise even if ventilation increas-es.
b. The single-breath CO2 curve (SBCO2) in-creases if ventilation does not.
c. The volumetric CO2 tracing will not change even if ventilation increases.
d. CO2 production decreases proportionally.
ANS: B
If metabolism increases and ventilation does not, PaCO2 rises and the amount of CO2 exhaled during the SBCO2 increases.
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