Which organ regulates the amount of carbon dioxide circulating in the blood?
kidneys
blood
pancreas
lungs
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
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.
Correct Answer is C
Explanation
Rationale:
A. Hyperparathyroidism typically causes hypercalcemia, which would not result in a positive Chvostek’s sign.
B. Severe burns can cause fluid and electrolyte imbalances, including hypocalcemia, but it's less specific than option C.
C. Chronic alcohol abuse can lead to hypocalcemia and hypomagnesemia, which are known causes of a positive Chvostek’s sign, a clinical sign of neuromuscular irritability due to low calcium levels.
D. Osteoporosis may be related to chronic calcium deficiency, but it does not directly cause the acute hypocalcemia needed to produce a positive Chvostek’s sign.
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