Chap 5: Bone (exam 2) Flashcards Preview

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Flashcards in Chap 5: Bone (exam 2) Deck (18)
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1
Q

Bone is another type of specialized ct which is what compared to cartilage?

A

harder and less flexible

2
Q

what are the four main functions of bone?

A

structural support, serves as levers for muscles/locomotion, protect organs and house bone marrow, metabolic reserve for minerals

3
Q

What are the two types of matrix found in Bone?

A

inorganic matrix and organic matrix

4
Q

the inorganic matrix is made up of what?

A

hydroxyapatite crystals, calcium phosphate and other minerals

5
Q

about 65% of the bones dry weight comes from what matrix?

A

inorganic matrix

6
Q

The organic matrix is made up of what?

A

collagen (I primarily), GAG’s, glycoproteins,

7
Q

80-90% of the organic matrix is made up of what?

A

collagen

8
Q

In the organic matrix collagen is highly what?

A

organized

9
Q

What are the two types of GAG’s in the organic matrix

A

Sulfated and unsulfated GAGs

10
Q

The unsulfated gag are what?

A

HA

11
Q

the sulfated GAG’s are what?

A

Chondroitin and keratin sulfates

12
Q

The glycoproteins in the organic matrix are proteins that bind what to what?

A

minerals to collagen

and matrix components to cells

13
Q

Glycoproteins are also known as what?

A

binding proteins

14
Q

the binding proteins will enhance what?

A

the mineral deposition in an orderly fashion during the ossification process

15
Q

There is a lower % of minerals leading to more flexibility on bone in adults or children?

A

children

16
Q

due to more flexibility of bone in children, children are more prone to what type of fracture

A

greenstick

17
Q

In adults how are the collagen arrangements compared to children?

A

more random arrangements

18
Q

As maturity increases matrix will uniformly what leading to what?

A

increase; stability increase