Skeletal 3

Question 1

Matrix

Answer 1

Osteoid – organic material secreted by osteoblasts
Collagen (fiber), Proteoglycans & Glycoproteins (ground substance)
Provides flexibility so inadequate fiber leads to brittle bones

Question 2

Calcification

Answer 2

Inorganic salts
Hydroxyapatite (Ca10(PO4)6(OH)2) & ions crystalize & deposit around collagen
Hardens bone so inadequate Ca+2 leads to soft bones

Question 3

connective tissues, cartilage & bone are formed by

Answer 3

blast cells that secrete matrix & mature into -cyte cells

Question 4

Chondrin

Answer 4

is the matrix of cartilage

Question 5

Osteoid

Answer 5

is the matrix of bone.

Question 6

Cartilage growth

Answer 6

is formed by chondroblasts secreting chondrin. Trapped chondroblasts mature into chondrocytes.Cartilage lacks blood vessels & calcification

Question 7

Bone growth

Answer 7

is formed by osteoblasts that secrete osteoid. The osteoid is then calcified, & the trapped osteoblasts mature into osteocytes. Initial bone growth produces spongy & compact bone & when appropriate medullary cavities. Bone has both. blood vessels & calcification

Question 8

Endochondrial

Answer 8

within cartilage

Question 9

Appositional

Answer 9

on the surface (perichondrial, periosteal, endosteal…)

Question 10

Interstitial =

Answer 10

between cells, within spaces of organs or tissues, not in body cavities

Question 11

Cartilage growth

Answer 11

this interstitial growth is within mesenchyme)

Question 12

Cartilage Growth – Maintenance & Remodeling

Answer 12

Interstitial or Appositional)