Exam 2 Skeletal system part 2 Flashcards

1
Q

Matrix of bone tissue is made up of:

A

Fibers & ground substance

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2
Q

Fibers of bone tissue are made up of;

A

Type 1 collagen fibers, which provide strength to resist tensile forces

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3
Q

Ground substance for bone tissue is made up of _______ component and an _______ component

A

Organic & inorganic compound

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4
Q

Organic component of the ground substance for bone tissue is made up of:

A
  • Proteoglycans
    • Chondroitan sulfate, keratan sulfate & hylaluronic
      acid
  • Glycoproteins- esp. osteocetin and osteoclacin
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5
Q

Inorganic component for ground substance for bone tissue is made up of:

A

Hydroxyapatite, a mineral composite, which provides strength to resist compressive forces

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6
Q

What are the different types of bone cells:

A

Osteoprogenitor cells
Osteoblast
Osteocytes
Osteoclast

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7
Q

Give rise to osteoblasts

- Located in the cellular layer of the periosteum and in the endosteum

A

Osteoprogenitor cells

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8
Q
  • lay down new bone tissue

- Located w/in the central & perforating canals of osteons & w/in the periosteum & endosteum

A

Osteoblasts

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9
Q

Originate from ostoprogenitor cells

A

Osteoblast

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10
Q
  • Former osteoblasts

- Located w/in the lacunae of the osteons of compact bone & bony struts of spongy bone

A

Osteocytes

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11
Q

Maintain surrounding bone tissue & regulate mineral content

A

Osteocytes

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12
Q
  • Bone destroying cells

- Cells are large & multinucleated, originating from the fusion of several monocytes

A

Osteoclasts

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13
Q

Secrete acid

A

Osteoclast

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14
Q

_______ &______ are active during growth and during repair

A

Osteoblast & osteoclast

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15
Q

What are the types of bone tissue:

A

Primary & secondary bone tissue

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16
Q

AKA woven bone tissue “immature”

A

Primary bone tissue

17
Q
  • Develops first, during fetal development

- Also associated w/ repair of fractures

A

Primary bone tissue

18
Q
  • Collagen fibers are randomly arranged
  • Mineral content is lower
  • Contains more osteocytes than mature bone tissue
A

Primary bone tissue

19
Q

AKA lamellar bone

A

Secondary bone tissue

20
Q

Compact bone outer layer of densely packed bone tissue, composed of osteons, Circumferential lamellae, and interstitial lamellae

A

Secondary bone tissue

21
Q

Osteons consist of:

A
Lamellae
Central canal (osteonic or Haversian) 
Lacunae
Canaliculi 
Perforating canals (communicating, Volkmann's)
22
Q

Concentric layers of bony connective tissue; w/in each layer, the collagen fibers are oriented at right angles to the fibers in the adjacent layers

23
Q

Contains vascular structures & nerves

A

Central canal (osteonic, Haversian)

24
Q

Holes found b/t lamellae

25
Passageways connecting lacunae to each other & to the central canal
Canaluculi
26
Connecting central canals to each other
Perforating canals ( Communicating or Volkmann's)
27
Multiple layers of mineralized matrix
Circumferential lamellae
28
Located immediately deep to the periosteum
External circumferential lamellae
29
Located at the perimeter of the medullary cavity
Inner circumferential lamellae
30
Layers of mineralized matrix, lying b/t & around osteons; the remains of partially destroyed osteons
Interstitial lamellae
31
- Found in the interior of a bone | - lattice/network of bony bars & struts, each consisting of just a few concentric layers of bony connective tissue
Spongy bone
32
Very thin layer of modified compact bone, lacking the extensive vascular channels
Subchondral bone
33
Found underlying articular cartilage, making up the articular surface
Subchondral bone
34
Wolff's Law
A bone remodels it's shape according to the way force is transmitted through it.