Parathyroid hormone effects the

ATI LPN

ATI LPN Test Bank

A. bones, heart, and blood B. kidney, liver, and spleen C. intestine, kidneys, and bone D. liver, stomach, and small intestine

Correct Answer: C

Rationale: PTH acts on bones (resorption), kidneys (reabsorption), and intestines (via vitamin D).

Which of the following substances releases hydrogen ions into a solution?

A. acids B. bases C. salts D. glucose

Correct Answer: A

Rationale: Acids donate hydrogen ions, lowering pH.

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.

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