BONE REMODELING --- notes

Question 1

How much of the skeleton is remodeled every year?

Answer 1

1/5

Question 2

Which bone has the most remodeling?

Answer 2

Femur (in the epiphyses)

Question 3

What causes your bones to remodel more?

Answer 3

The more you exercise / are active.

Question 4

The simultaneous breakdown (reabsorbstion by osteoclasts) and rebuilding (deposition) of new bone by osteoblasts.

Answer 4

In general this is bone remodeling

Question 5

What are the Purposes for Remodeling?

Answer 5

a. To Adjust Bone to Stress
b. To Increase Length and Diameter of Medullary Cavity as bone grows
c. To Regulate Calcium Levels in the Body

Question 6

How do the bones adjust to stress?

Answer 6

1. The slight bending of bones as muscles pull on them causes remodeling.
2. Electrical signals tell bone when to tear down and when to build up.

Question 7

Why do we need to regulate calcium levels?

Answer 7

Calcium is essential for:
heart beat,
muscle contraction,
electricity in nerves and
blood clotting.