Which of the following statements regarding acute and chronic changes in PCO2 is true? A) Acute changes in PCO2 have a greater effect on alveolar ventilation than chronic changes.... Which of the following statements regarding acute and chronic changes in PCO2 is true? A) Acute changes in PCO2 have a greater effect on alveolar ventilation than chronic changes. B) Chronic changes in PCO2 have a greater effect on alveolar ventilation than acute changes. C) Both acute and chronic changes equally influence alveolar ventilation. D) Changes in PCO2 do not affect ventilation at all.
Understand the Problem
The question is asking us to identify the correct statement concerning the effects of acute and chronic changes in partial pressure of carbon dioxide (PCO2) on alveolar ventilation. It requires knowledge in physiology and respiratory mechanisms to evaluate the provided options.
Answer
Acute changes in PCO2 have a greater effect on alveolar ventilation than chronic changes.
Acute changes in PCO2 have a greater effect on alveolar ventilation than chronic changes.
Answer for screen readers
Acute changes in PCO2 have a greater effect on alveolar ventilation than chronic changes.
More Information
Acute changes in the partial pressure of carbon dioxide (PCO2) quickly influence respiratory drive and ventilation because they rapidly alter blood pH levels.
Tips
A common mistake is assuming that chronic changes in PCO2 would have a greater impact due to their persistence, but the rapid change in pH with acute changes is more effective at altering ventilation.
Sources
- The interpretation of arterial blood gases - nps.org.au
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