Under normal conditions, most water loss from the

ATI LPN

ATI LPN Test Bank

Under normal conditions, most water loss from the body is through the

A. skin B. kidneys C. lungs D. GI tract

Correct Answer: B

Rationale: The kidneys excrete the majority of water via urine under normal conditions.

Which of the following terms does not belong with the other three?

A. acidosis B. pH increases C. H⁺ ion concentration increases D. carbonic acid levels increase

Correct Answer: B

Rationale: pH increases indicates alkalosis, not acidosis like the others.

When normal buffer mechanisms are overwhelmed by excessive numbers of hydrogen ions, which of the following will result?

A. acidosis B. alkalosis C. neither of these D. None of the above

Correct Answer: A

Rationale: Excess H⁺ overwhelms buffers, causing acidosis (low pH).

The K⁺ level of 2.8 mEq/L indicates hypokalemia. Low plasma K⁺ levels will cause

A. thirst B. muscle weakness C. increased body temperature D. tremors, tetany, and convulsions

Correct Answer: B

Rationale: Hypokalemia (low K⁺) impairs muscle function, causing weakness.

hyperventilation

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

Correct Answer: B

Rationale: Hyperventilation reduces CO₂ causing respiratory alkalosis.

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