Product name:Rat Parathyroid hormone,PTH ELISA Kit
Calcium homeostasis is maintained by 2 hormones, parathormone (parathyroid hormone or PTH) and calcitriol (1,25-dihydroxy vitamin D). Minute-to-minute regulation of serum ionized calcium is regulated by PTH. PTH secretion is stimulated when ambient serum ionized calcium is decreased. PTH acts on peripheral target cell receptors, increasing the efficiency of renal tubular calcium reabsorption. In addition, PTH enhances calcium resorption from mineralized bone and stimulates conversion of vitamin D to its active form, calcitriol, which subsequently increases intestinal absorption of calcium and phosphorus. Pharmacologic doses of calcitonin act as an antagonist to PTH, lowering serum calcium and phosphorus and inhibiting bone reabsorption.