Anatomy Objectives Flashcards

1
Q

Which cells lay down bone matrix?

A

Osteoblasts

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2
Q

Osteoblasts later become what cell type of mature bone?

A

Osteocytes

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3
Q

The cells which direct deposition of cartilage and bone are derived from what?

A

The mesenchyme.

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4
Q

The mesenchyme forms the greater part of the middle germ layer known as what?

A

Mesoderm

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5
Q

What is the basic osteophyte structure

A

Each osteophyte rests in the lacuna and has long branching processes which extend through canaliculi in the mineralized matrix to the lacunae of neighboring cells.

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6
Q

Fetal skeleton is characterized by bones formed in a membrane (intramembranous ossification) which precedes or accompanies bones formed in cartilage (endochondral ossification)

A

Gimme!

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7
Q

Membrane bones develop in what tissue?

A

Fibrous tissue (Cranium and facial bones)

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8
Q

Cartilage bone is preformed in what tissue?

A

Cartilage

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9
Q

Intramembranous ossification determines which measurement of the bone?

A

Diameter

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10
Q

In intramembranous ossification, Mesenchymal cells coalesce to form what kind of model of the future bone?

A

Fibrous model

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11
Q

Endochondral ossification determines which measurement of the bone?

A

Length

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12
Q

In endochondral ossification, mesenchymal cells form what kind of model of the future bone

A

Cartilage model

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13
Q

Ossification takes place within the cartilage model by 1 or more centers of ossification. Where is the primary and secondary sites located?

A

Primary site - center

Secondary at the ends of bones

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14
Q

In the primary ossification site, cartilage cells hypertrophy and arranged themselves in rows

A

Gimme!

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15
Q

Calcification of the intercellular matrix occurs followed by death of the chondrocytes. At the same time, blood vessels with osteoblasts from the peripheral tissues invade the central area?

A

Gimme!

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16
Q

Compact bone is formed under the direct ratio of stress known as what law?

A

Wolff’s Law

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17
Q

Spongy bone of the skull is known as what?

A

Diploe

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18
Q

An investing layer of connective tissue which covers the non-articular surfaces of all bones is known as what type of bone?

A

Periosteum

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19
Q

Thinner than periosteum, lines the medullary is what type of bone?

A

Endosteum

20
Q

All bone is derived from what?

A

Mesoderm

21
Q

Osteoblast synthesizes

A

Matrix and osteoid

22
Q

What makes up 90% of the organic component of the bone matrix?

A

Type 1 collagen

23
Q

What makes up the majority of the inorganic matrix?

A

Calcium hydroxyapetite

24
Q

What is the time period between osteoid production and mineralization of the matrix?

A

12-15 days

25
Q

Osteoblast lays down osteoid and loses its ability to produce osteoid and becomes what cell?

A

Osteocyte

26
Q

Osteocytes are connected by a system of tunnels called what?

A

Canaliculi

27
Q

What is the function of osteoclasts?

A

Bone resorption

28
Q

Secondary center of ossification in areas of ligamentous or tendinous attachments that contribute to the shape of the bone but not growth.

A

Apophysis

29
Q

In long bones, endochondral ossification is located where?

A

Physis and metaphysics where active bone formation takes place.

30
Q

There are 4 zones to the physics what are they?

A
  1. Reserve zone (on epiphyseal side)
  2. Zone of proliferation
  3. Zone of hypertrophy
  4. Zone of mineralization (Zone of endochondral ossification)
31
Q

Hormonal changes cause the physeal plate to turn to bone. What factors are involved?

A

GH-Somatotropin
Thyroid-hormones-thyroxine and tri-iodothyronine
Sex hormones

32
Q

What is the process called by which organic matrix is produced with subsequent mineralization of the inorganic matrix.

A

Ossification

33
Q

In what type of bone does collagen form in parallel arrangements?

A

Lamellar

34
Q

Lamellar bone requires a cartilage precursor

A

Gimme!

35
Q

Random collagen organization that is laid rapidly

A

Woven Bone

36
Q

What is normal deciduous dentition for a canine?

A

Total teeth = 14
Upper: 3,1,3
Lower: 3,1,3

37
Q

What is normal adult dentition for a canine?

A

Total teeth = 21
Upper: 3,1,4,2
Lower: 3,1,4,3

38
Q

Which teeth have more than 1 root in an adult canine?

A

Maxillary:
1st premolar = 1 root
2nd + 3rd premolar = 2 roots
4th premolar, 1st and 2nd molar = 3 roots

Mandibular:
1st premolar and 3rd molar = 1 root
The rest of the mandibular teeth have 2 roots.

39
Q

What is normal decidous dentition for a feline?

A

Total teeth = 13
Upper: 3,1,3
Lower: 3,1,2

40
Q

What is normal adult dentition for a feline?

A

Total teeth = 15
Upper: 3,1,3,1
Lower: 3,1,2,1

41
Q

Which teeth in an adult feline have more than 1 root?

A

Upper: 2nd premolar has 2 roots, 3rd premolar has 3 roots
Lower: all premolars/molars have 1 root

42
Q

What is the vertebral formula for cats, dogs, horses, bovine, porcine, and ferrets?

A
Cats: C7,T13,L7,S3, Ca5-23
Dogs: C7,T13,L7,S3,Ca up to 20
Equine: C7,T18,L6,S5,Ca 15-21
Bovine: C7,T13,L6,S5 Cd 18-20
Porcine: C7, T14-15,L6-7,S4, Ca20-23
Ferrets - variable. 50% of patients examine in VRU 56.2 (117-123) had formula of C7,T14,L6,S3 with T,L or S varying by 1
43
Q

Normal dentition for an adult horse?

A

I 3/3
C 1/1 or 0/0
P 3 (4) / 3
M 3/3

44
Q

Normal deciduous dentition for a foal?

A

I 3/3
C 0/0
P 3/3

45
Q

Normal adult dentition for a cow?

A

I 0/4
C 0/0
P 3/3
M 3/3

46
Q

Deciduous dentition for a cow?

A

I 0/4
C 0/0
P 3/3