Chap 6 pt. 1

Question 1

Skeletal system dived into the

Answer 1

• Axial skeleton

- Appendicular skeleton

Question 2

Axial Skeleton

Answer 2

-forms long axis (80 bones)

Question 3

Appendicular Skeleton

Answer 3

-bones of limbs and girdles (126 bones)

Question 4

Sesamoid

Answer 4

• inside tendons

- near joints

Question 5

Structural unit of compact bone

Answer 5

osteon

Question 6

Osteoprogenitor Cells (Osteogenic Cells)

Answer 6

LOCATION: periosteum and endosteum
FUNCTION: divide to produce osteoblasts

Question 7

Why is the division of osteoprogenitor cells into osteoblasts important?

Answer 7

Important for repairing structures

Question 8

Osteocytes

Answer 8

-mature bone cells
-mechanosensors
FUNCTION: secrete osteoid and acid phosphatase

Question 9

Osteoblasts

Answer 9

immature bone cells
LOCATION: periosteum
-bone builders

Question 10

Osteoclasts

Answer 10

LOCATION: surfaces of bone
FUNCTION: bone resorption

Question 11

The diaphysis is wrapped in a connective tissue called

Answer 11

periosome

Question 12

Periosome consists of

Answer 12

• Fibrous outer layer

- Inner cellular layer

Question 13

Periosome function

Answer 13

• isolation
• route for circulatory and nervous supply
• participates in bone and growth repair

Question 14

Endosteum

Answer 14

incomplete cellular layer containing osetoblasts, clasts and progenitors

Question 15

Osteogenesis

Answer 15

bone formation

Question 16

Intramembranous Ossification

Answer 16

• Dermal bones formed (flat bones on skull, mandible and clavicle)
• spicules

Question 17

Endochondral Ossification

Answer 17

osteoblasts replace chondrocytes

-bone growth

Question 18

Ossification

Answer 18

laying down of new bone

Question 19

Calcification

Answer 19

formation of calcium salts and crystals within tissue

Question 20

Calcification is a step within Ossification

Answer 20

but NOT visa versa