Which Statement Is False About the Skeletal Alterations Caused by Chronic

question 36

Multiple Choice

Which statement is false about the skeletal alterations caused by chronic renal failure?

• A) When the glomerular filtration rate (GFR)declines to 25% of normal,parathyroid hormone (PTH)is no longer effective in maintaining serum phosphate levels.
• B) When the glomerular filtration rate (GFR)declines to 25% of normal,the parathyroid gland is no longer able to secrete sufficient parathyroid hormone (PTH).
• C) When the glomerular filtration rate (GFR)declines to 25% of normal,there is impaired synthesis of 1,25-vitamin D₃,which reduces intestinal absorption of calcium.
• D) When the glomerular filtration rate (GFR)declines to 25% of normal,there is impaired synthesis of 1,25-vitamin D₃,which impairs the effectiveness of calcium and phosphate resorption from bone by parathyroid hormone (PTH).

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