The Skin and It's Functions

Question 1

How many layers does the skin have?

Answer 1

3

Question 2

What are the 3 layers of the skin?

Answer 2

1. Epidermis
2. Dermis
3. Subcutaneous fat

Question 3

What are the 5 functions of the skin?

Answer 3

1. Thermoregulation
2. Water conservation
3. Molecular synthesis
4. Sensation
5. Immune functionality

Question 4

What cell type makes up the epidermis?

Answer 4

Stratified squamous epithelium

Question 5

What is the main epidermal cell?

Answer 5

Keratinocyte

Question 6

What are the 4 layers of the epidermis?

Answer 6

1. Stratum corneum (outermost)
2. Stratum granulosum
3. Stratum spinosum
4. Stratum basale (innermost)

Question 7

How long does it take for the keratinocytes to fully regenerate and shed?

Answer 7

28-30 days

Question 8

What are the non-keratinised cells that are present in the epidermis?

Answer 8

1. Melanocytes
2. Merkel cells
3. Langerhans cells

Question 9

What is the function of a melanocyte?

Answer 9

Pigment maintenance of the skin

Question 10

What are the function of Merkel cells?

Answer 10

Respond to pressure and touch

Question 11

What are the function of Langerhans cells?

Answer 11

They are the antigen presenting cell of the skin

Question 12

What is the main purpose of the dermis?

Answer 12

This is the supportive layer of the skin, mainly made from connective tissue

Question 13

Which structures allow for thermoregulation in the skin?

Answer 13

1. Blood vessels
2. Sweat glands
3. Hair

Question 14

What makes up the pilosebaceous unit?

Answer 14

1. Hair follicle
2. Sebaceous unit
3. Apocine sweat gland
4. Vessels
5. Arrector pilli muscles

Question 15

What happens to the cells of the epidermis as they migrate through the layers?

Answer 15

They lose their blood supply and become flattened