Section G: Bone Growth & Remodeling 1. Where does bone growth to increase length

Question

Section G: Bone Growth & Remodeling 1. Where does bone growth to increase length occur? 2. What do chondroblasts produce? 3. When bones stop growing in length, what structure is left over? 4. Do bones activity stop when you finishing growing? Explain your answer. 5. What factors stimulate bone remodeling? 6. From what point onward does osteogenesis occur in an embryo? 7. What is endochondral ossification and where does it occur? 8. During remodeling, what cells cause bone deposition? 9. During remodeling, what cells cause bone reabsorption? 10. Briefly explain how mineral balance is important for bone growth. 11. What happens to your bones as you age?

Explanation / Answer

1. The bone growth area is called Metaphysis it contains growth plate.

2. Chondroblast are present in cartilage they will turn into chondrocytes and produce matrix and fibres of cartilage

3. The structures left are Epiphysis and diaphysis of bone.

4. Bone activities does not stop because it is important in maintaining the calcium metabolism of calcium.

5. Factors stimulates bone remodelling are osteoblast and osteoclasts

6. From third week onwards the development of bones takes place

7. Endochondral ossification is the formation of bones from the cartilage. It takes place in fetus.

8. Osteocytes and osteoblast cells form bone deposition.

9.Osteoclast form bone reabsorbtion

10. Bone growth is depend on the calcium levels in blood. So when excess calcium is present bone formation occours. When the level of calcium decreased in blood plasma calcium is Reabsorbtion into blood to maintain hemostasis.

11. As we age the bone become decreased in density and mass. It becomes osteoporotic in nature and easy to break.

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