Under normal physiologic conditions, what is the determinant of the PACO2?
A. PCO2
B. PaCO2
C. CO2
D. PICO2
?ANS: C
A. Incorrect response: See explanation C.
B. Incorrect response: See explanation C.
C. Correct response: The determinant of the PACO2 and the PaCO2 is CO2 with respect to the ventilation delivered to perfused alveoli.
D. Incorrect response: See explanation C.
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