Changes

Bone Response to Damage (view source)

676 bytes removed , 10:30, 18 July 2008

Line 36: Line 36:

***Produced by <u>C-cells in the thyroid glands</u> in response to <u>increased</u> serum calcium

***Inhibits osteoclasts

−

~~===Bone dynamics===~~

−

*Bone growth and maintenance of normal structure are directly related to mechanical forces

−

*Mechanical forces generate bioelectrical potentials (piezoelectricity)

−

**These potentials strengthen bone

−

**Inactivity reduces the potentials -> bone loss

−

*In neonates:

−

**Bone growth predominates

−

**Modelling is important

−

*In adults:

−

**Formation of bone is balanced by resorption - remodelling

−

**Continues throughout life under the influence of hormones and mechanical pressure

−

**Bone resorption may exceed formation in pathological states (hormonal, trauma, nutritional) or in old age and disuse

−

~~<big><center>[[Bones|'''BACK TO BONES''']]</center></big>~~

1,351

edits