Lec 2 Skin Structure & Function

Question 1

What are the 3 layers of skin?

Answer 1

• Epidermis
• Dermis
• Subcutaneous layer

Question 2

What are the 5 layers of epidermis?

Answer 2

1. Stratum Corneum
2. Stratum Lucidum
3. Stratum Granulosum
4. Stratum Spinosum
5. Stratum Basale

Question 3

What are the 2 layers of dermis?

Answer 3

Papillary and reticular

Question 4

What cells are present in the dermis layer?

Answer 4

Mast cells
Macrophages
Fibroblast

Question 5

List some components of papillary layer

Answer 5

• Capillaries
• Pain and touch receptor
• Dermal ridges

Question 6

List some of the components of reticular layer

Answer 6

• Dense and regular
• Collagen fibre= provides strength and elasticity
• Hair follicles, sweat glands, sebaceous glands
• Dermal tearing causes stretch mark

Question 7

What are the 5 functions of skin?

Answer 7

PSREB

Question 8

How are freckles formed?

Answer 8

Accumulation of melanin stimulated by UV radiation

Interaction of tyrosinase + melanocytes