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Flashcards in Skin Deck (33):
1

What are the two layers of skin called?

Dermis and epidermis

2

What is the layer below the skin called?

Hypodermis/subcutis

3

Which type of skin is glabrous (not hairy)?

Thick skin

4

What type of epithelium is the epidermis made up of?

Stratified squamous epithelium

5

How many layers does the epidermis have and what are they called?

Five if thick, four if thin
Basal/germinal layer, spinous/squamous layer, granular layer, clear/translucent layer, cornified layer

6

Which layer of epidermis isn't present in thin skin?

Clear/translucent layer

7

What cells are present in the basal/germinal layer of epidermis?

Proliferating and non-proliferating keratinocytes, melanocytes, merkel cells

8

What cells are present in the spinous/squamous layer of epidermis?

Keratinocytes connected by desmosomes, Langerhans cells

9

What cells are present in the granular layer of epidermis?

Keratinocytes - without nuclei and have granular cytoplasm

10

What cells are present in the clear/translucent layer of epidermis?

Dead flattened keratinocytes

11

What cells are present in the cornified layer of epidermis?

Anucleated corneocytes (attached by corneodesmosomes)

12

What are melanocytes?

Pigment cells

13

What are Langerhans cells?

Immunological

14

What are Merkel cells?

Mechanoreceptors

15

What are the two layers of dermis called?

Papillary layer and reticular layer

16

What are rete ridges?

Epidermal down-growths

17

What are dermal papillae?

Upward projections into epidermis

18

What is a dermatome?

Area of skin supplied by a single spinal root

19

What are the two types of cutaneous sensory receptors?

Unencapsulated/free nerve endings and encapsulated nerve endings

20

What type of sensors do free nerve endings act as?

Pain, itch and temperature sensors

21

What type of sensors do encapsulated nerve endings act as?

Mechanoreceptors

22

Where are Merkel cell-neurite complexes located?

Dermal epidermal junction

23

What do Merkel cell-neurite complexes detect?

Pressure

24

Are Merkel cell-neurite complexes rapid or slow adapting?

Slow

25

Where are Pacinian corpuscles located?

Dermal-subcutaneous junction

26

What do Pacinian corpuscles detect?

Vibration and pressure

27

Are Pacinian corpuscles rapid or slow adapting?

Rapid

28

Where are Meissner's corpuscles located?

Dermal papillae

29

What do Meissner's corpuscles detect?

Light touch

30

Are Meissner's corpuscles rapid or slow adapting?

Rapid

31

Where are Ruffini endings located?

Subcutaneous layer/dermis

32

Are Ruffini endings rapid or slow adapting?

Slow

33

What do Ruffini endings detect?

Stretching and shearing