Assertion: osteoblast | /r/HasProperty | activated by parathyroid hormone
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text: Osteoblasts can be activated by different kinds of hormones (such as parathyroid hormone and prostaglandin E2) and growth factors (such as insulin-like growth factor, transforming growth factor-β, bone morphogenetic protein) to increase the level of cytosolic cAMP, and stimulates the synthesis of DNA and collagen.