HK 190 > Chap 5 > Flashcards

Chap 5 Flashcards

(44 cards)

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1
Q

Integumentary System consists of

A
  • cutaneous membrane

- accessory membrane

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2
Q

Cutaneous membrane =

A

skin

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3
Q

Accesory membrane =

A

hair, nails

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4
Q

EPIDERMIS

A
  • stratified squamous epithelium
  • main cell type = keratinocytes
  • hemidesmosomes to basal lamina
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5
Q

Thin skin =

A

4 layers of keratinocytes

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6
Q

Thick skin =

A

5 layes of keratinocytes

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7
Q

Epidermal layers - superficial to deep

A
  • Stratum Corneum
  • Stratum Lucidium
  • Stratum Granulosum
  • Stratum Spinosum
  • Stratum Basale (germinativum)
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8
Q

Stratum Corneum

A
  • “horn”
  • dead cells tightly interconnected by desomosomes
  • water resistant
  • 15-30 layers of keratinocytes
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9
Q

Stratum Lucidium

A
  • “clear”
  • thick skin only
  • acked with keratin and devoid of organelles
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10
Q

Stratum Granulosum

A
  • “grainy”
  • large amounts of protein keratin and keratohylain
  • 3-5 layers of keratinocytes
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11
Q

Stratum Spinosum

A
  • “spiny”
  • 8-10 layers of keratinocytes
  • includes Langerhans (dendritic) cells
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12
Q

Stratum Basale (Germinativum)

A
  • anchored to basal lamina

- epidermal ridges which interlock with dermal papillae

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13
Q

Melanin packages into vesicles =

A

melanosomes

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14
Q

Breakdown of melanosomes =

A

light skinned

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15
Q

Breakdown in stratum granulosum

A

dark skinned

niggers

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16
Q

Orange/ yellow pigament

A

carotene

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17
Q

Yellow/ brown pigament

A

Melanin

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18
Q

Melanocytes in stratum basale =

19
Q

Function of Melanin

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A

protection from effects of UV radiation

20
Q

What produces hair colour?

21
Q

Cyanosis

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A

-low blood flow

22
Q

DERMIS – 2 layers

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A
  • Papillary layer

- recticular layer

23
Q

Papillary layer

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A
  • areolar tissue

- dermal papillae = folds on surface

24
Q

Reticular layer

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A
  • dense irregular tissue

- collagen and elastic fibres

25
collagen =
very strong, resists stretching
26
elastic fibres =
stretchy
27
Nerve cells regulate to:
- blood flow - secretion rates - moniter sensory receptors
28
Sensory Receptors respond to:
- light touch - deep pressure - vibration - chemicals - temp
29
HYPODERMIS - tissue types
-areolar and adipose tissue
30
Functions
- elasticity - reduce heat loss - energy reserve - blood reservoir
31
HAIR
- insulates - protects - detects movement - arrector pili
32
Sebaceous Glands
secrete oil through holocrine secretion -2 types: _ simple branched alveolar glands _ sebaceous follicles
33
simple branched alveolar glands
share duct with hair follicle
34
sebaceous follicles
not associated with hair follicles
35
Sebaceous glands functions
- inhibits bacterial growth | - lubs and protects keratinized cells (hair and skin)
36
Sweat glands =
sudiriferous glands
37
Merocrine sweat glands
-controlled by theromoreglutatory and emotional center -Function: _cooling _excrete water _flushes
38
Apocrine sweat glands
- includes cermuninous and mammary glands | - odour
39
_____ cells are contractile cells that squeeze the gland
Myoepithelial
40
Ceruminous glands (modified apocrine sweat gland)
- secretion: cerumen = ear wax | - protects ear drum by trapping foreign particles
41
Skin Cancer types
- basal carcinoma - Squamous cell carinoma - Melanoma
42
Basal Carcinoma
- least dangerous, most common | - stratum basale
43
Squamous cell carinoma
-stratum spinosum
44
Melanoma
-least common, most dangerous -Characteristics: _Asymmetry _Border _Colour _Diameter
HK 190
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