TYK307
All of the following statements regarding calcium metabolism are true EXCEPT:
a) PTH increases 1,25-vitamin D production by stimulating renal 1α-hydroxylase activity.
b) PTH increases urinary cAMP excretion.
c) In contrast to 1,25-vitamin D, PTH decreases renal reabsorption of phosphate.
d) PTHrP is essential in maternal-fetal exchange of calcium and fetal bone maturation.
e) All of the above are true.
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