Which of the following statements regarding oxygenation and ventilation is correct?
A. In carbon monoxide (CO) poisoning, ventilation is impaired because CO binds to oxygen very quickly.
B. Oxygenation is the movement of air into and out of the lungs, whereas ventilation is the exchange of gases.
C. In mines or confined places, where oxygen levels are low, ventilation may continue despite inadequate oxygenation.
D. Oxygenation without adequate ventilation can occur in climbers who quickly ascend to an altitude of lower atmospheric pressure.
Answer: C. In mines or confined places, where oxygen levels are low, ventilation may continue despite inadequate oxygenation.
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