A patient has end-stage chronic obstructive pulmonary disease (COPD). Which acid-base imbalance would be predictable in a patient with COPD?

Respiratory acidosis

Respiratory alkalosis

Metabolic alkalosis

Metabolic acidosis

Answer and Explanation

The Correct Answer is A

Choice A reason: This is correct because respiratory acidosis is a condition where the blood pH is lower than the normal range of 7.35 to 7.45, due to impaired gas exchange or hypoventilation, which causes carbon dioxide to accumulate in the blood. COPD is a chronic lung disease that obstructs the airways and reduces the oxygen intake and carbon dioxide output. This leads to respiratory acidosis in the patient.

Choice B reason: This is incorrect because respiratory alkalosis is a condition where the blood pH is higher than the normal range of 7.35 to 7.45, due to hyperventilation, which lowers the carbon dioxide in the blood. COPD does not cause hyperventilation, but rather hypoventilation.

Choice C reason: This is incorrect because metabolic alkalosis is a condition where the blood pH is higher than the normal range of 7.35 to 7.45, due to a loss of acids or an excess of bases in the body. COPD does not affect the metabolic system directly, but rather the respiratory system.

Choice D reason: This is incorrect because metabolic acidosis is a condition where the blood pH is lower than the normal range of 7.35 to 7.45, due to an excess of acids or a loss of bases in the body. COPD does not affect the metabolic system directly, but rather the respiratory system.

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Correct Answer is B

Explanation

Choice A reason: This is incorrect because filtration is a passive transport mechanism that does not require cellular energy. Filtration is the movement of fluid and solutes across a membrane due to hydrostatic pressure.

Choice B reason: This is correct because active transport is a transport mechanism that requires cellular energy in the form of ATP. Active transport is the movement of molecules across a membrane against their concentration gradient, using carrier proteins.

Choice C reason: This is incorrect because diffusion is a passive transport mechanism that does not require cellular energy. Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration, until equilibrium is reached.

Choice D reason: This is incorrect because osmosis is a passive transport mechanism that does not require cellular energy. Osmosis is the movement of water across a semipermeable membrane from an area of lower solute concentration to an area of higher solute concentration.

A. Metabolic alkalosis, uncompensated B. Respiratory alkalosis, uncompensated C. Respiratory acidosis, uncompensated D. Metabolic acidosis, uncompensated

Correct Answer is D

Explanation

Choice A reason: This is incorrect because metabolic alkalosis is characterized by a high pH and a high HCO3-. The patient's pH and HCO3- are both low, indicating acidosis, not alkalosis.

Choice B reason: This is incorrect because respiratory alkalosis is characterized by a high pH and a low PaCO2. The patient's pH is low and PaCO2 is normal, indicating a metabolic problem, not a respiratory one.

Choice C reason: This is incorrect because respiratory acidosis is characterized by a low pH and a high PaCO2. The patient's pH is low, but PaCO2 is normal, indicating a metabolic problem, not a respiratory one.

Choice D reason: This is correct because metabolic acidosis is characterized by a low pH and a low HCO3-. The patient's pH and HCO3- are both low, indicating a metabolic disorder. The condition is uncompensated because the PaCO2 is normal, meaning the respiratory system is not compensating for the metabolic acidosis.

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A patient has end-stage chronic obstructive pulmonary disease (COPD). Which acid-base imbalance would be predictable in a patient with COPD?

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Naxlex Comprehensive Predictor Exams

Which transport mechanism involves cellular energy?

Correct Answer is B

Explanation

Lena Mason, who has diabetes, is admitted in a stuporous condition. Her blood gases show a pH of 7.33, PaCO2 of 40 mm Hg, and HCO3- of 20 mEq/L. What type of acid-base imbalance does this patient have?

Correct Answer is D

Explanation

PaCO2 level indicates the effectiveness of:

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