A 72-year-old man is recently found to have hypocalcemia and Osteomalacia is suspected based on the decrease in the cortical bone thickness and osteopenia seen on x-rays. Which of the following is the most likely mechanism of the resistance to the effects of vitamin D?

Question

Accepted Answer

excess parathyroid hormone secretion

Answer

insufficient parathyroid hormone secretion

Answer

defective receptors for 25(OH) vitamin D

Answer

defective receptors for 1,25OH2 vitamin D

A 72-year-old man is recently found to have hypocalcemia and Osteomalacia is suspected based on the decrease in the cortical bone thickness and osteopenia seen on x-rays. Which of the following is the most likely mechanism of the resistance to the effects of vitamin D?

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