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Why does vitamin D increase the activity of osteoblasts?

scilearner
in Biology

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Hello everyone,

 

I just read that vitamin D increases the activity of osteoblasts and osteoclasts (secondary effect). Why does vitamin D increase the activity of osteoblasts if it is trying to increase serum calcium levels? Also bone matrix is made up of type 2 collagen but osteoblasts secrete type 1 collagen. Why is that? Thanks :D

Edited by scilearner

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