Hubs

Question 0

Tube running through the middle of osteon

Answer 0

Central canal

Question 1

Cylinder shaped structures in compact bone

Answer 1

Osteons

Question 2

Calcified matrix in osteon

Answer 2

Lamellae

Question 3

Spaces between lamellae

Answer 3

Lacunae

Question 4

Canals connecting osteocytes

Answer 4

Canaliculi

Question 5

Crisscrossing branches in cancellous bone

Answer 5

Trabecular

Question 6

Compact bone resists…

Answer 6

Tension

Question 7

Cancellous bone resists…

Answer 7

Compression

Question 8

Shaft

Answer 8

Diaphysis

Question 9

Where is cancellous bone found?

Answer 9

Epiphysis

Question 10

Define periosteum

Answer 10

A fibrous membrane that coats surface of bone

Question 11

Define endosteum

Answer 11

Lines medullary cavity

Question 12

Define osteoblasts

Answer 12

Synthesise extra cellular matrix

Question 13

Define osteoclasts

Answer 13

Break down bone minerals

Question 14

Define Osteocytes

Answer 14

Mature osteoblasts

Question 15

Where are osteocytes found?

Answer 15

In the lacunae, in lamellae

Question 16

What percentage of ECM is organic?

Answer 16

33%

Question 17

What percent of ECM is inorganic?

Answer 17

67%

Question 18

What is organic matter in ECM?

Answer 18

Colleges and ground substance (protoeglycons)

Question 19

What matter makes up inorganic ECM?

Answer 19

Hydroxyapatite (mineral salts)

Question 20

Organic component resists…

Answer 20

Tension

Question 21

Inorganic component resists…

Answer 21

Compression

Question 22

What type of pathology occurs when osteoclasts activity outweighs osteoblasts activity? What structural changes occur in compact and cancellous bone?

Answer 22

Osteoporosis. Look up symptoms in book

Question 23

Name three types of fractures

Answer 23

Compound, simple, green stick

Question 24

Define a compound fracture

Answer 24

Also known as open fracture. Bone penetrates skin and open to the environment

Question 25

Define simple fracture

Answer 25

Also known as closed fracture. Broken bone confined to inside the body. Ie opposite of open

Question 26

Define green stick fracture

Answer 26

A partial break resulting in splinters. Usually occurs only in children.

Question 27

How many stages of healing are there?

Answer 27

4

Question 28

First stage of healing a fracture

Answer 28

Haematona (blood clot) formed

Question 29

Second stage of healing a fracture

Answer 29

Fibroblasts (make fibres) and chondroblasts (make cartilage) firm a soft callus

Question 30

Third stage of healing a fracture

Answer 30

Osteoblasts replace with bone tissue forming a hard callus

Question 31

Last stage of healing a fracture

Answer 31

Bone remodelling via osteoblasts and osteoclasts