Answer: B - The amount of carbon dioxide in the bloodstream is a direct reflection of alveolar ventilation. Any increase in the patient’s minute ventilation will cause a lowering of the PaCO2 value. Oxygen levels move opposite of carbon dioxide levels, but are not dependent on it. The extra acid produced from the heightened muscular respiratory effort will be buffered by the body’s normal mechanism.

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NREMT Paramedic

Category - Airway

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What would be a direct reflection of alveolar ventilation?

Oxygen in bloodstream
Carbon dioxide in the bloodstream
Both A and B
Neither A nor B

Explanation

Answer: B - The amount of carbon dioxide in the bloodstream is a direct reflection of alveolar ventilation. Any increase in the patient’s minute ventilation will cause a lowering of the PaCO₂ value. Oxygen levels move opposite of carbon dioxide levels, but are not dependent on it. The extra acid produced from the heightened muscular respiratory effort will be buffered by the body’s normal mechanism.

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NREMT Paramedic

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