Bone

Question 1

What are the role of osteoblasts?

Answer 1

They produce organic bone matrix to form bone (ie. following an injury)

Question 2

What type of cell forms Howslip’s lacunae?

Answer 2

Osteoclast

Question 3

Name the major organic component of bone

Answer 3

Collagen type I

Question 4

What fibre penetrates the alveolar cortical plate to anchor the tooth?

Answer 4

Sharpey’s fibres

Question 5

Name the two tissue layers of bone

Answer 5

Periosteum & endosteum

Question 6

What is the role of the endosteum?

Answer 6

It lines the trabeculae & Haversian canals / internal cavities

Question 7

What is the periosteum?

Answer 7

It is an outer sheath of fibrous CT that contains osteoprogenitor cells within

Question 7

What is the periosteum?

Answer 7

It is an outer sheath of fibrous CT that contains osteoprogenitor cells within

Question 8

What is structure is not found in compact/cortical bone?

Answer 8

Trabeculae

Question 9

Name the two types of bone

Answer 9

Compact/cortical & spongy/trabecular

Question 10

Where are canaliculi found?

Answer 10

In compact/cortical bone

Question 11

What are canaliculi in the bone?

Answer 11

Small canals/ducts that enable cellular communication

Question 12

Maturation of osteoblasts result in…

Answer 12

Osteocytes

Question 13

What is the name of each concentric layer formed in an osteon?

Answer 13

Lamellae

Question 14

What does appositional growth do to long bones?

Answer 14

It increases the diameter of bone

Question 15

What is interstitial growth?

Answer 15

The growth of chondrocytes in lacunae of epiphyseal plates and increases the length of bone

Question 16

What are osteoprogenitor cells?

Answer 16

Stem cells that differentiate into osteoblasts

Question 17

Name the two types of ossification

Answer 17

Intramembranous & endochondral

Question 18

Where does intramembranous ossification occur?

Answer 18

Within mesenchymal tissue

Question 19

Where does endochondral ossification occur?

Answer 19

In cartilage

Question 20

What does intramembranous ossification lead to?

Answer 20

Formation of long bones & bones of skull base (ie. ethmoid & sphenoid)

Question 21

What does endochondral ossification lead to?

Answer 21

Formation of flat bones

Question 22

What is hypertrophy?

Answer 22

Chondrocytes increase in size

Question 23

Flat bones of the body include…

Answer 23

Most cranial bones, bones of the face & clavicles (collarbones)