What Effect Does Aging Have on PaCO₂ in the Healthy

question 14

Multiple Choice

What effect does aging have on PaCO₂ in the healthy adult?

• A) PaCO₂ remains constant throughout adult life
• B) It decreases 2 mmHg per year after age 45
• C) It increases 2 mmHg per year after age 45
• D) It decreases until age 75 then levels off.

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