Cells, Matrix, Ossification, Bone Density, Bone Variation Flashcards Preview

Spinal Anatomy > Cells, Matrix, Ossification, Bone Density, Bone Variation > Flashcards

Flashcards in Cells, Matrix, Ossification, Bone Density, Bone Variation Deck (11)
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1
Q

What is the primary constituent of the ground substance?

A

Glycosaminoglycans

2
Q

What is the principal type of protein fiber in bone?

A

Collagen type I

3
Q

What is the most frequently described deposit in bone?

A

Hydroxyapatite

4
Q

What are the three responses of bone which allow it to be described as “living”?

A

It has the ability to heal, to remodel under stressors, and to age

5
Q

What is the name given to the pattern of ossification in mesenchyme?

A

Intramembranous ossification

6
Q

What is the name given to the pattern of ossification in cartilage?

A

Endochondral ossification

7
Q

What is the timing for the appearance of ossification in cartilage?

A

From the second to fifth month in utero

8
Q

What part of the skull is derived form endochondral ossification?

A

Chondrocranium

9
Q

What bone of the appendicular skeleton is formed by both endochondral and intramembranous ossification?

A

Clavicle

10
Q

What are the names given to the centers of ossification based on time of appearance?

A
  • Primary centers of ossification appear before birth

- Secondary centers of ossification appear after birth

11
Q

What are the primary sources of variation observed in bone?

A
  • Gender variation (sexual dimorphism)
  • Ontogenetic variation (growth or age variation)
  • Geographic or population-based variation (ethnic variation)
  • Idiosyncratic variation (individual variation)

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