L2 - Functions of skin

Question 1

Functions of skin?

Answer 1

Water loss, stops microorganisms, UV protection, vit D synthesis

Question 2

What are the 5 divisions of the epidermis? Briefly describe one key feature about each tier.

Answer 2

Stratum Basale - Stem cells, melanocytes, Merkel cells

Stratum spinosum - largest layer, keratin filament network

Stratum granulcum - produce oil, contribute to hydrophobic barrier

Stratum Lucidum - dead cells, thick skin layer

Stratum corneum - dead cells

Question 3

What are the cell types found in the epidermis?

Answer 3

Keratinocytes, melanocytes, langerhans cells, Merkel cells.

Question 4

Two CT layers of dermis

Answer 4

Papillary = movement of immune cells 
Reticular = dense irregular CT, surrounds hair follicles , has BV and glands.

Question 5

Cells in dermis layer?

Answer 5

Fibroblasts (elastin, collgen), mast cells and macrophages