Changes

Bone Response to Damage (view source)

475 bytes removed , 10:34, 18 July 2008

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**Regulated by androgens

*If growth teporarily stops -> layer of bone seals the growth plate -> moves into metaphysis when growth resumes -> forms '''Harris lines'''

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~~===Bone resorption===~~

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*Mediated by two [[Parathyroid Pathology#Hormonal Control|hormones]]:

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**'''Parathyroid hormone (PTH)'''

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***Produced by chief cells in the parathyroid glands in response to decreased serum calcium

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***In response, osteoclasts increase in number and resorb mineralised matrix - increase Ca in blood

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**'''Calcitonin'''

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***Produced by C-cells in the thyroid glands in response to increased serum calcium

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***Inhibits osteoclasts

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