Free NCLEX RN Practice Questions Practice Question
The nurse is reviewing the lab results of a client's arterial blood gases. The $\mathrm{PaCO}_2$ indicates effective functioning of the:
Correct Answer: C
Rationale: The $\mathrm{PaCO}_2$ level specifically reflects the respiratory function, as it measures carbon dioxide concentration in arterial blood, which is primarily regulated by the lungs. Elevated $\mathrm{PaCO}_2$ indicates impaired ventilation, while decreased levels suggest effective gas exchange.
Option A, kidneys, primarily regulate bicarbonate and acid-base balance, not $\mathrm{PaCO}_2$. Option B, pancreas, is involved in digestion and insulin production, unrelated to blood gas levels. Option D, liver, plays a role in metabolism and detoxification, but does not directly influence $\mathrm{PaCO}_2$. Thus, the lungs are the key organ indicated by this measurement.
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