A 56-year-old man is admitted to the hospital because of a 1-week history of progressive nausea, anorexia dyspnea, and lethargy. He has a 15-year history of type 2 diabetes mellitus and hypertension. His respirations are 28/min, and blood pressure is 175/98 mm Hg. Physical examination shows jugular venous distension and pedal edema. Bilateral crackles are heard on auscultation of the chest. His serum creatinine concentration is 7.2 mg/dL. Which of the following is most likely to be decreased in serum in this patient? a) Alkaline phosphatase b) 1,25-dihydroxycholelciferol c) Parathyroid hormone d) Phosphorus e) Potassium f) Uric acid

A 56-year-old man is admitted to the hospital because of a 1-week history of progressive nausea, anorexia dyspnea, and lethargy. He has a 15-year history of type 2 diabetes mellitus and hypertension. His respirations are 28/min, and blood pressure is 175/98 mm Hg. Physical examination shows jugular venous distension and pedal edema. Bilateral crackles are heard on auscultation of the chest. His serum creatinine concentration is 7.2 mg/dL. Which of the following is most likely to be decreased in serum in this patient? a) Alkaline phosphatase b) 1,25-dihydroxycholelciferol c) Parathyroid hormone d) Phosphorus e) Potassium f) Uric acid