Which organ regulates the amount of carbon dioxide circulating in the blood?

kidneys

blood

pancreas

lungs

Answer and Explanation

The Correct Answer is D

Rationale:
A. Kidneys regulate bicarbonate and acid-base balance but do not directly regulate CO₂ levels.
B. Blood carries CO₂ but does not regulate its amount.
C. Pancreas is involved in digestion and insulin secretion, not CO₂ regulation.
D. Lungs regulate CO₂ by controlling its exhalation during respiration, directly affecting CO₂ levels in the blood.

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Correct Answer is D

Explanation

Rationale:
A. Respiratory alkalosis results from hyperventilation, which is unlikely with opioid overdose.
B. Metabolic acidosis can occur from other causes but is not the primary imbalance here.
C. Metabolic alkalosis is not associated with opioid overdose.
D. Respiratory acidosis occurs due to hypoventilation caused by opioid-induced respiratory depression, leading to CO₂ retention and decreased pH.

A. normal ABG B. metabolic acidosis C. metabolic alkalosis D. respiratory acidosis

Correct Answer is C

Explanation

Rationale:
A. Normal ABG would have pH between 7.35–7.45, PaCO₂ between 35–45 mmHg, and HCO₃⁻ between 22–26 mEq/L. This ABG is not fully normal.
B. Metabolic acidosis is characterized by low pH and low HCO₃⁻, which is not the case here.
C. Metabolic alkalosis shows elevated HCO₃⁻ (30 mEq/L) and a near-normal but slightly alkalotic pH (7.44). The elevated PaCO₂ (48 mmHg) suggests partial respiratory compensation.
D. Respiratory acidosis would have a low pH and high PaCO₂, which doesn't match this ABG.

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Which organ regulates the amount of carbon dioxide circulating in the blood?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

An emergency department nurse admits a client who has tried to commit suicide by taking an overdose of hydromorphone (Dilaudid), a narcotic. For which acid-base imbalance should the nurse assess this client for?

Correct Answer is D

Explanation

Interpret the following ABG: pH 7.44, PaCo2 48mmHg, HCO3 30 Meq/L

Correct Answer is C

Explanation

The nurse can record that the compensatory mechanism for the correction of metabolic acidosis is in effect when the nurse observes?

The client is experiencing respiratory acidosis as a result of COPD is likely to present with which of the following clinical signs? (Select 4 options that apply)

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