Bone

Question 1

What are some functions of bone?

Answer 1

Support
Protection
Mineral storage - Ca metab
Haemopoesis

Question 2

What are the bone cells?

Answer 2

Osteocytes
Osteoblasts
Osteoclasts

Question 3

What are the constituents of the bone ECM?

Answer 3

65% Calcium hydroxyapatite

35% Organics (collagen, proteoglycans and such things)

Question 4

What is cancellous bone?

Answer 4

Spongy bone
Present on the inside of bone
Trabeculae of bone
Bone marrow

Question 5

What is cortical bone?

Answer 5

Much denser
On outside
80% bone mass

Question 6

What is an osteon?

Answer 6

aka Haversian system
Central haversian canal
With concentric lamellae
Functional unit of bone

Question 7

What are volkmanns canals?

Answer 7

Horizontal connections between osteons

Question 8

What are canaliculi?

Answer 8

Tiny interconnecting tunnels between osteocytes

Connect via gap junctions

Question 9

What is a fracture?

Answer 9

A discontinuity of the cortical bone

Question 10

Describe the process of fracture repair:

Answer 10

1. ) Haemotoma formation
2. )Fibrocartilagenous callus formation
3. )Bony callus formation
4. )Bone remodelling