9.4 Anatomy of structure and function of skin

Question 1

what are the main cell types in skin?

Answer 1

Keratinocytes

Question 2

what are the layers of the epidermis (outside-in)

Answer 2

corneal 
lucidum 
Granular 
Spinous 
Basal

Question 3

what are the layers of the dermis and how would you differentiate them?

Answer 3

papillary layer
Reticular layer
The reticular layer has the protein bundles in an orderly formation

Question 4

what is the major structural component of the skin?

Answer 4

collagen which has 13 types, 9 present in skin and the main one is type 1

Question 5

what are the sensation receptors, what do they sense and where are each located?

Answer 5

Pacinia copruscle: deep dermis and subcutis - deep sensation and vibration
Meissner’s corpuscle: located in superficial dermis, act as mechanoreceptors and detect fine touch

Question 6

what is the cycle of hair follicle growth?

Answer 6

1. anagen
2. catagen
3. telogen
4. mesanagen
5. anagen
   ACTMA