Renal Quiz #9Renal Tubular Defects

1. A 4-year-old boy is brought to the pediatrician by his parents, who are concerned about his short stature and episodes of muscle weakness. Laboratory tests reveal hypokalemia, hypophosphatemia, and metabolic alkalosis. Urinalysis shows increased excretion of potassium, phosphate, and bicarbonate. Which of the following renal tubular defects is most likely responsible for these findings? 

Question 1 of 5

2. A newborn is diagnosed with a genetic disorder affecting the renal tubules that leads to an inability to properly reabsorb chloride in the thick ascending limb of the loop of Henle. Which of the following conditions does this newborn most likely have? 

Question 2 of 5

3. A 32-year-old woman presents with muscle weakness, cramps, and occasional palpitations. Laboratory findings reveal hypokalemia, metabolic alkalosis, and normal-to-low blood pressure. She has no history of diuretic use. Which of the following genetic alterations is most likely present in this patient? 

Question 3 of 5

4. A 7-year-old girl is diagnosed with a condition that leads to hypokalemic metabolic alkalosis with hypocalciuria. This condition is most likely due to a defect in which of the following renal structures? 

Question 4 of 5

5. A patient presents with metabolic acidosis and urinary stone formation. Laboratory tests reveal hyperchloremia and a urine pH that cannot be lowered below 5.5, even after administration of ammonium chloride. This presentation suggests a defect in the ability of the kidney to: 

Question 5 of 5


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