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histology > Layers > Flashcards

Layers Flashcards

1
Q

Continuously proliferating Stratified Squamous
Epithelium

A

Epidermis

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2
Q

Provides/Produces a non-living surface layer of
protein

A

Epidermis

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3
Q

In direct contact with the external
environment

A

epidermis

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4
Q

Associated with lipids

A

EPIDERMIS

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5
Q

This constantly shed

A

epidermis

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6
Q

what tissues compose dermis

A

fibrous and fibro-adipose tissue

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7
Q

this support epidermis physically and metabolically

A

dermis

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8
Q

what protein is in epidermis

A

keratin

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9
Q

this is 0.07 to 0.12 mm

A

epidermis

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10
Q

surface epithelium of epidermis

A

Stratified squamous keratinized epithelium

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11
Q

layer for mitosis in epidermis

A

germinal basal

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12
Q

what production associated with germinal basal layer?

A

keratinocytes

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13
Q

true or false: germinal basal layer is in continuously in mitosis

A

true

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14
Q

they are make up mostly of epidermis

A

Keratinocytes

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15
Q

this means the peeling of the skin

A

desquamation

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16
Q

Rate of mitosis = Rate of desquamation

A

Average: 15-30 days; 25 to 50 days

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17
Q

this is the major distinction between thick and thin skin

A

epidermis

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18
Q

75 to 150 um

A

thin skin

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19
Q

400 to 1400 um

A

thick skin

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20
Q

germinal layer

A

stratum basle

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21
Q

constant supply of new keratinocytes

A

stratum basale

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22
Q

stratum Basale has this figures which constantly produce new keratinocytes

A

mitotic figures

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23
Q

cells shape in stratum basale

A

cuboidal or low columnar

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24
Q

stratum basale cells are attached to the basement membrane via?

A

hemidesmosomes

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25
Q

cells stratum basale are attached to each other by

A

desmosomes

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26
Q

nucleus: Large ; cytoplasm: ?

A

basophilic

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27
Q

thickest sublayer of epidermis

A

stratum spinosum

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28
Q

Large, cuboidal to polygonal, some flattened cells

A

Stratum Spinosum

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29
Q

Numerous cytoplasmic prickles
and adjacent cells are bound by ?

A

desmosomes

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30
Q

stratum spinosum nucleus location?

A

central

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31
Q

cytoplasm of stratum spinosum

A

basophilic

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32
Q

what does cytokeratin form

A

intracellular fibrils

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33
Q

what is cytokeratin?

A

(synthetic fibrillar protein)

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34
Q

These spaces are occupied by
seemingly spinous structures called

A

tonofibrils

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35
Q

what layer continuous synthesizing of keratins

A

stratum spinosum

36
Q

3-5 rows of flattened cells

A

Stratum Granulosum

37
Q

stratum granulosom cytoplasm are filled with numerous ?

A

keratohyalin granules and coarse basophilic granules

38
Q

Found only in thick skin

A

stratum lucidum

39
Q

thick skin is found only what part of the body?

A

palm and sole

40
Q

Thin translucent layer of flattened eosinophilic
keratinocytes

A

stratum lucidum

40
Q

true or false: stratum lucidum has organelles and nuclei are found within the cells

A

false (they are absent di pumasok)

41
Q

in stratum lucidum, cytoplasm are fill with what?

A

keratin filaments in an electron dense matrix

42
Q

15 to 20 layers of squamous keratinized cells

A

stratum corneum

43
Q

this is layer of dead and dying cells

A

stratum corneum

44
Q

characteristics of cells in stratum corneum?

A

flat, cornified, and unnucleated filled with mature keratin

45
Q

this layer is the end of keratinization

A

Stratum corneum

46
Q

Continuously shed at epidermal surface

A

stratum corneum

47
Q

location of thick skin

A

palms and soles

48
Q

location of thin skin

A

rest of the body except palms and soles

49
Q

true or false:thick skin has hair follicle

A

false (walang hair folliclesa thick skin sige magulat ka pag may j\hair sa palm mo and sole )

50
Q

arrector pili muscle are found (thin or thick)

A

thin skin

51
Q

sebaceous glands are found (thin or thick)

A

thin skin (never oily and palm and soles natin)

52
Q

sweat glands (thick or thin)

A

both

53
Q

Layer underneath the epidermis

A

dermis

54
Q

Provides a flexible but strong base for the epidermis

A

dermis

55
Q

binds to the hypodermis

A

dermis

56
Q

dermis is important for _____

A

themoregulation

57
Q

two zone of dermis

A

papillary and reticular

58
Q

this is the upper portion of dermis

A

papillary

59
Q

thicker layer of the dermis

A

reticular

60
Q

important constituent of papillary and reticular zones

A

elastin

61
Q

this is black against red stained collagen

A

elastin

62
Q

what kind of staining when the elastic fibers will appear black against red collagen

A

vernhoeff stain

63
Q

characteristic of elastin in reticular layer

A

long, thick, and follow course of collagen bundles

64
Q

characteristic of elastin in papillary layer

A

very fine, scanty, and scarcely stained

65
Q

cellular components of dermis

A

Fibroblasts
Lymphocytes
Mast cells
Tissue macrophages

66
Q

thickness of dermis?

A

0.3 - 4 mm

67
Q

Loose connective tissue with types I and III collagen
fibers, fibroblasts and scattered mast cells, dendritic
cells, and leukocytes

A

papillary dermis

68
Q

papillary dermis consist of

A

small and highly sensitive vascular papillae

69
Q

papillary dermis contains pacinian corpuscles (true or false)

A

false (meissner’s corpuscle)

70
Q

what are the vascular papillae found in papillary

A

venules, arterioles, capillary loops, & lymphatics

71
Q

Dense irregular connective tissue (mainly bundles of
type I collagen), with more fibers and fewer cells

A

reticular dermis

72
Q

Coarse, irregular bundles of collagen, very large
elastic fiber

A

reticular dermis

73
Q

fribroelastic

A

reticular dermis

74
Q

in reticular dermis, blood vessels are (small or large)

A

large and deeper

75
Q

what are the main cells in reticular

A

fibroblast and histiocytes

76
Q

what are histiocytes

A

macrophages in tissues

77
Q

not a layer of the skin

A

hypodermis

78
Q

hypodermis is made up what tissue

A

adipose tissue

79
Q

hypodermis is also called

A

subcutaneous layer of loose CT beneath the dermis

80
Q

superficial fascia

A

hypodermis

81
Q

function of hypodermis

A

binds skin loosely to subjacent organs

82
Q

what cells are found in hypodermis

A

adipocytes

83
Q

Str. basale + Str. spinosum

A

Stratum germinativum

84
Q

a term meaning fully keratinized or
cornified

A

squames

histology (5 decks)

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