Histology - 514-2 Flashcards Preview

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Flashcards in Histology - 514-2 Deck (45):
1

T/F
The volume of cells exceeds the volume of extracellular matrix in connective tissues.

False.

The extracellular matrix is much greater.

2

Name four types of connective tissue

Ebryonic
Connective tissue proper
Specialized
Supporting

3

What is an example of embryonic connective tissue?

Mesenchymal
(also mucous)

4

Name four kinds of CT Proper.

Loose
Dense (regular and irregular)
Reticular
Elastic

5

What is an example of specialized CT?

Adipose tissue
(also hematopietic)

6

What are two types of supporting CT?

Cartilage (hyaline, elastic, fibrocartilage)
Bone

7

What are all connective tissues derived from?

Mesenchyme
(embryonic mesenchymal cells)

8

Which connective tissue cell is most abundant?

Fibroblasts

9

Why fibroblasts, not fibrocytes?

Because they are so transformable.

10

From what cell is a macrophage derived?

Monocyte
(type of WBC - leukocyte)

11

Trace the cell differentiation that results in an osteoclast

(working backwards)
Osteoclast - macrophage - monocyte - hematopoietic stem cell - mesenchyme

12

T/F
Extracellular matrix is found in epithelia

False

13

What is ground substance

component of ECM / gel-like amorphous subst

14

What characterizes Reticular Fibers

Type III collagen
Spongy tissue (bv walls)

15

What characterizes Elastic Fibers?

made from Elastin
can stretch 150% resting length

16

What is the most abundant type of collagen?

Type I

17

What type of collagen is a gel-like substance?

Type IV

18

What type of collagen is abundant in the placenta?

Type V

19

Which collagen forms anchoring loops in the basal lamina?

Type VII

20

What collagen is found in Descement's membrane in the cornea?

Type VIII

21

What collagen type is found in mineralizing cartilage?

Type X

22

What cell produces collagen?

Fibroblasts

23

What are the steps of collagen production?

Preprocollagen - pro collagen - tropocollagen - collagen fibrils

24

What step is Vitamin C dependent?

Preprocollagen - procollagen
(enzymes depend on C to put into triple helix)

25

Does tropocollagen have end strands?

No - end strands are removed at this stage

26

What can bind ECM ground substance to integrin proteins?

Glycoprotein

27

What does "areolar" mean?

loose

28

What are the four kinds of connective tissue proper?

Loose
Dense (regular and irregular)
Reticular
Elastic

29

How do Mast Cells "dilute" an area of infection?

Release histamine (vasodilator)

30

Where are type III collagen fibers found?

Reticular CT

31

T/F
Elastic fibers are branched

False

32

What's going on with Ehlers-Danlos Syndrome that allows for unusually elastic skin?

Defective Collagen synthesis.

33

What kind of adipose tissue is multilocular?

Brown

34

What can be considered intracellular CT?

Adipose tissue

35

What kind of fat gets its name from an organelle?

Brown - because it is loaded with mitochondria.

36

Name 3 kinds of cartilage and 2 kinds of bone

Hyaline, Elastic, Fibro-
Compact and Spongy

37

What membrane surrounds cartilage?

Perichondrium

38

What are chondroblasts surrounded by matrix?

Chondrocytes

39

All cartilage contains what type of collagen?

Type II

40

What type of cartilage is the template for endochondral bone formation?

Hyaline

41

What additional ingredient does elastic cartilage contain?

Elastic fibers
(found in external ear / epiglottis)

42

T/F
Elastic Cartilage has no perichondrium.

False

43

What type of cartilage is found in the TMJ?

Fibrocartilage
Resists compressing and absorbs shock

44

What type of collagen is found in the TMJ

Type I and II
(Type II only in hyaline/elastic)

45

What's another name for spongy bone?

Trabecular

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