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Biological product growth factors

Three hormones serve as the principal regulators of calcium and phosphate homeostasis parathyroid hormone (PTH), fibroblast growth factor 23 (FGF23), and the steroid vitamin D (Figure 42-2). Vitamin D is a prohormone rather than a true hormone, because it must be further metabolized to gain biologic activity. PTH stimulates the production of the active metabolite of vitamin D, l,25(OH)2D. l,25(OH)2D, on the other hand, suppresses the production of PTH. l,25(OH)2D stimulates the intestinal absorption of calcium and phosphate. l,25(OH)2D and PTH promote both bone formation and resorption in part by stimulating the proliferation and differentiation of osteoblasts and osteoclasts. Both... [Pg.954]

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Biological factors

Biological growth

Biological product

Biological production

Growth production

Productivity growth

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