Cartilage and Bone

Question 0

What are isogenous groups?

Answer 0

multiple cells in a lacuna after chondrocyte undergoes mitosis

Question 1

What are the three types of cartilage and what fibers are in their ground substance?

Answer 1

Hyaline: Type 2 collagen
Elastic: Type 2 collagen + elastic fibers
Fibrocartilage: Type 1 collagen

Question 2

What are the major components of bone matrix?

Answer 2

Osteoid (Type I collagen, GAGs, PGs)

Hydroxyapatite (Ca10(PO4)6(OH)2)

Question 3

What are the cells of bone?

Answer 3

Osteoprogenitor cell
Osteoblast (secretes bone matrix around itself and becomes an osteocyte)
Osteocyte
Osteoclast

Question 4

What are the layers (superficial to deep) of the diaphysis and epiphysis of long bones?

Answer 4

Diaphysis: periosteum, compact bone, medulla
Epiphysis: articular cartilage, cancellous bone, medulla

Question 5

What does compact bone have that cancellous bone lacks?

Answer 5

Haversian systems

Question 6

Which cells maintain the bone matrix? How do they communicate?

Answer 6

osteocytes, gap junctions between cytoplasmic processes that course through canaliculi

Question 7

Osteoclasts make contact with bone surfaces via their _____ and create a depression called a ____.

Answer 7

ruffled border, Howship’s lacuna

Question 8

Which type of bone undergoes endochondral formation? Intramembranous?

Answer 8

long and short; flat