51. A 36-year-old woman has a parathyroid
hormone (PTH)-secreting tumor. Which of the
following might be expected to increase as a
result of chronic PTH elevation?
◦ Bone resorption *
◦ Bone deposition
◦ Ca2+
excretion from the intestines
◦ PO4
3+
absorption from the intestines
◦ PO4
3+
reabsorption from the kidneys
52. The normal serum calcium level is ___mg/100 ml?
a) 4-6
b) 6-8
c) 9-11
d) 14-16
53. Normal daily calcium excretion in urine is ___mg?
a) 50
b) 100
c) 200
d) 300
54. For calcium metabolism, all of the following are
required except?
a) vitamin D
b) parathyroid hormone
c) calcitonin
d) thyroxine
55. cholecalciferol is?
a) vitamin D3
b) precursor of vitamin D3
c) occurs in skin
d) physiologically active
56. The active form of vitamin D is?
a) calcium
b) 1,25 DHCC
c) parathyroid hormone
d) cholecalciferol
57. The primary site of 1,25 DHCC formation from its
immediate precursor is?
a) bone
b) liver
c) kidney
d) skin
58. The following statement about calcium
absorption from small intestine are true
except?
(A)It occurs by active transport.
(B) It requires vit. D and parathormone.
(C)It occours by passive diffusion from upper
small intestine.
(D)It is decreased by excess phosphate and
oxalate in food
