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Flashcards in Epidermis Deck (41):
1

Avascular layer

Epidermis

2

Lies superficial to dermis

Location of stratum basale

3

How does the stratum basale connect to the dermis?

It's wavy borderline

4

Thick bundles of intermediate filaments

Stratum spinosum

5

Deepest layer of epidermis

Stratum basale

6

The dermis is made of what kind of tissue?

Dense connective tissue

7

How thick is the stratum corneum

20-30 layers thick 3/4 of epidermal thickness

8

Flattened layer of the epidermis

Stratum granulosum

9

Most cells are keratinocytes

Epidermis

10

The epidermis is made out of what tissue?

Stratified squamous epithelium

11

Cytoplasm is full of granules

Stratum granulosum

12

What is the Hypodermis tissue made of?

Adipose tissue

13

A tissue that isn't technically part of the skin

Subcutaneous tissue
Hypodermis

14

How does the stratum lucidum form?

Formed from dead cells of the deeper strata

15

Cells undergo mitosis
Actively dividing
Daughter cells are pushed to become the more superficial layers

Stratum basale

16

Cornified or keratinized to prevent water loss

Characteristic of epidermis

17

Anchors skin to underlying organs

Function of Hypodermis

19

Clear layer of epidermis

Stratum lucidum

20

Superficial to stratum basale

Stratum spinosum

20

Where is the stratum granulosum located

Superficial to stratum spinosum

21

Where is stratum lucidum located

Thick hairless skin of the palms and soles

22

Outermost layer of the epidermis

Stratum corneum

23

Organelles are deteriorating

Stratum granulosum

24

What are the shingle like dead cells in the stratum corneum filled with?

Keratin

25

The stratum corneum rubs and flakes off slowly and steadily as?

Dandruff

26

How often does a new epidermis form

25 to 45 days

27

Outer layer of the skin

Epidermis

28

Produces melanin

Melanocytes

29

As melanin is produced it accumulates in these membrane bound granules

Melanosomes

30

Spider shaped cells

Melanosomes

31

Taken up by keratinocytes

Melanin

32

Melanocytes are most common where?

Stratum basale

33

What determines the amount of melanin produced?

Genetics
Exposure to sunlight

34

Where melanin is concentrated in one spot

Freckles and moles

35

Melanin forms a pigment umbrella over superficial nuclei to shield from what?

UV

36

How does overexposed to uv rays lead to cancer?

Alters the DNA of skin cells

37

Many people infected with what are more likely to have an eruption

Herpes simplex (cold sore)

38

Alert the immune system to threats such as bacterial or viral invasion

Epidermal dendritic cells

39

Associated with sensory nerve endings, serve as touch receptors

Merkel cells

40

Skin functions

Protects deeper tissue from
Mechanical damage
Bacterial damage
Chemical damage
Thermal radiation
Ultraviolet radiation
Dessication
Synthesizes vitamin d
AIDS in excretion of urea
AIDS in body heat loss or retention

41

Drying out

Dessication