19. Which set of serum values would be most typical of a patient with a vitamin

Question

19.     Which set of serum values would be most typical of a patient with a vitamin D deficiency?
a.      high serum phosphate, high serum calcium, and high PTH
b.      low serum phosphate, high serum calcium, and high PTH
c.      low serum phosphate, high serum calcium, and low PTH
d.      low serum phosphate, low serum calcium, and high PTH
e.      high serum phosphate, low serum calcium, and low PTH

20. Which cause-and-effect relationship is correct for a deficiency of active vitamin D (calcitriol)?

a.      bone formation is increased because vitamin D blocks the action of PTH on bone resorption
b.      osteoporosis, but not osteomalacia, is associated with a calcitriol deficiency because calcitriol synergizes with PTH in its action on bone

c.      hypophosphatemia occurs because of decreased intestinal phosphate absorption
d.      hypercalcemia occurs because of decreased intestinal calcium absorption

19.     Which set of serum values would be most typical of a patient with a vitamin D deficiency?
a.      high serum phosphate, high serum calcium, and high PTH
b.      low serum phosphate, high serum calcium, and high PTH
c.      low serum phosphate, high serum calcium, and low PTH
d.      low serum phosphate, low serum calcium, and high PTH
e.      high serum phosphate, low serum calcium, and low PTH

20. Which cause-and-effect relationship is correct for a deficiency of active vitamin D (calcitriol)?

a.      bone formation is increased because vitamin D blocks the action of PTH on bone resorption
b.      osteoporosis, but not osteomalacia, is associated with a calcitriol deficiency because calcitriol synergizes with PTH in its action on bone

c.      hypophosphatemia occurs because of decreased intestinal phosphate absorption
d.      hypercalcemia occurs because of decreased intestinal calcium absorption

Explanation / Answer

19. C- low serum phosphate, high serum calcium, and low PTH

20. B-osteoporosis, but not osteomalacia, is associated with a calcitriol deficiency because calcitriol synergizes with PTH in its action on bone.

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