KROK 1 2010 – Question 142 · KROK (Medicine) · Biological Chemistry
A 4 year old child with hereditary renal lesion has signs of rickets, vitamin D concentration in blood is normal. What is the most probable cause of rickets development?
- A. Increased excretion of calcium
- B. Lack of calcium in food
- C. Hyperfunction of parathyroid glands
- D. Hypofunction of parathyroid glands
- E. Impaired synthesis of calcitriol
Hint
A normal vitamin D level with rickets suggests a defect in a later activation step, so ask where the hormonal form is made and what a renal disease would do to it.
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