CH 10: vocab

Question 1

Organic components- 40% dry weight of bone, collagen, proteoglycans, glycoproteins, and phospholipids

Answer 1

Bone matrix

Question 2

Bone type: lamella

Answer 2

Normal bone

Question 3

Bone type: woven, not stress oriented

Answer 3

Immature or pathologic bone

Question 4

Bone type: mature lamellar

Answer 4

Cortical or Cancellous bone

Question 5

Spongy or trabecular bone

Answer 5

Cancellous bone

Question 6

When do fractures typically progress?

Answer 6

6 weeks

Question 7

Constitutes 80% of adult skeleton

Answer 7

Cortical bone

Question 8

Form bone; have increases endoplasmic reticulum, increased golgi apparatus, and increased mitochondria

Answer 8

Osteoblasts

Question 9

Resorb bone; generally more rapid than bone formation

Answer 9

Osteoclasts

Question 10

Constitutes 90% of mature skeleton; serve to maintain bone

Answer 10

Osteocytes

Question 11

Compression side of bone is electronegative and stimulates osteoblasts; tension side of bone is electropositive and stimulates osteoclasts

Answer 11

Piezoelectric effect

Question 12

Occurs long after fracture has healed clinically

Answer 12

Remodeling

Question 13

Woven bone formed during the repair phase is replaced with lamellar bone; affected by mechanical function according to Wolff’s law; remodels in response to stress and responses to plezoelectric charges

Answer 13

Remodeling

Question 14

Primary callus forms in about two weeks; soft callus involving endochondral ossification occurs if fracture is not in continuity; amount of callus is indirectly proportional to degree of immobilization; primary cortical healing occurs with immobilization and near-anatomic reduction

Answer 14

Repair