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. In a man undergoing surgery, it was necessary to aspirate the contents of the upper gastro-intestinal tract. After surgery, the following values were obtained from an arterial blood sample: pH 7.55, PCO₂ 52 mm Hg and HCO₃- 40 mmol/l. What is the underlying disorder?

Metabolic acidosis correct incorrect

Respiratory alkalosis correct incorrect

Metabolic alkalosis correct incorrect

Respiratory acidosis correct incorrect

* not completed

. A person was admitted to hospital in a coma. Analysis of the arterial blood gave the following values: PCO2 16 mm Hg, HCO3- 5 mmol/l and pH 7.1. What is the underlying acid-base disorder?

Metabolic acidosis correct incorrect

Respiratory alkalosis correct incorrect

Metabolic alkalosis correct incorrect

Respiratory acidosis correct incorrect

* not completed

. A climber attempts an assault on a high mountain in the Andes and reaches an altitude of 5000 meters (16,400 ft) above sea level. What will happen to his arterial PCO₂ and pH?

Both will be lower than normal. correct incorrect

The pH will rise and PCO₂ will fall. correct incorrect

Both will be higher than normal due to the physical exertion. correct incorrect

The pH will fall and PCO₂ will rise correct incorrect

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