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Pathology Thyroid and Parathyroid c299635e

PTH does not cause:

A
Maintains serum Ca2+
B
Ca2+ retention
C
Decreased PO43- excretion
D
May cause osteolysis
High-Yield Explanation
Ans. is 'c' decreased P043- excretionParathyroid hormone decreases the reabsorption of P043- in proximal convoluted tubule of kidney. This increases their excretion from the kidney.Effect of parathyroid hormoneon calcium*it increases serum calcium level byStimulates reabsorption of Ca by kidneyStimulates renal activation of vit. D which increases intestinal absorption of calciumOn Phosphorus*Decrease the level of P043- in Serum byDecreasing P043- reabsorption in kidney.

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