A 44-year-old man comes to the physician for a 2-month history of fatigue and soreness of his hands. Physical examination shows darkening of the skin of the forearms. Fasting glucose is 120 mg/dL. BMI is 20. Serum bicarbonate is 24 mEq/L. Serum potassium is 4.2 mEq/L. Which of the following combinations best explains this patient’s findings?
Heterozygous; decreased reabsorption of dibasic amino acids
Heterozygous; decreased secretion of cations into bile
Heterozygous; increased intestinal absorption of cations
Homozygous; decreased reabsorption of dibasic amino acids
Homozygous; decreased secretion of cations into bile
Homozygous; increased intestinal absorption of cations
No specific mutation; decreased reabsorption of dibasic amino acids
No specific mutation; decreased secretion of cations into bile
No specific mutation; increased intestinal absorption of cations
