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Question 1

outer layer of perichondrium composition and function

Answer 1

fibroblast layer produces Type I collagen and elastin

serves as transitional zone

Question 2

inner layer of perichondrium composition and function

Answer 2

differentiates into chondroblasts - secretes type II collagen

Question 3

locations of elastic cartilage

Answer 3

external ear/pinna and epiglottis

distinguishable by presence of elastin fibers

Question 4

osteoprogenitors

Answer 4

stem cells that produce osteoblasts

Question 5

osteoblasts

Answer 5

mesenchymal cells that produce osteoid

Question 6

osteocytes

Answer 6

former osteoblasts now tapped, no longer producing osteoid

mature bone cells embedded in bone matrix

Question 7

osteoclasts

Answer 7

remodel/resorb bone - larger than osteoblasts

Question 8

intramembranous ossification

Answer 8

mesenchyme derivative
forms calvaria, facial bones, portions of clavicle
primary ossification center is where it first starts ossifying

Question 9

endochondral ossification

Answer 9

hyaline cartilage derivative
forms base of skull, vertebral column, pectoral/pelvic girdle, extremities, portions of clavicle
primary ossification center in growth plate

Question 10

bone collar

Answer 10

cuff of periosteal bone that forms around the diaphysis of the hyaline cdartialge model in long bones

Question 11

regions of epiphyseal plate

Answer 11

reserve zone: primitive hyaline, chondrocytes run
Proliferative zone: chondrocytes cluster
hypertrophic zone: big chondrocytes form calcified matrix
vascular invasion zone: vasculature penetrates calcified matrix and osteoprotenitors invade

Question 12

layers of articulating cartilage

Answer 12

Tan Tran Rad Cal
Tangential - small parallel chondrocytes
transitional - slightly larger and oblique
radial - large chondrocytes run perpendicular
calcified - rests on underlying cortex of bone