intro to derm

Question 1

4 functions of skin

Answer 1

1. protection
   - UV, mech, infeciton, dehydration
2. body temp
3. vit D syn
4. appearance

Question 2

3 layers of skin

Answer 2

1. epiderm
2. dermis
3. subcutis (hypodermis)

Question 3

5 layers epi from out to in

Answer 3

Candians like good sushi boxes

1. corneum
2. lucidum
3. granulosum
4. spinosum
5. basale

Question 4

3 main cell types in epi

Answer 4

1. keratinocytes
2. melanocytes
3. langerhans

Question 5

what are keratinocytes

Answer 5

• throughout epi except top layer
• connected by demosomes
• make keratin

Question 6

what are melanocytes

Answer 6

• located in bottom layer
• we all have the same number
• make melanin

Question 7

what are langerhans cells

Answer 7

• antigen presenting cells

- find intruders and set off innate systme

Question 8

2 layers of dermis

Answer 8

1. papillary

2. reticular

Question 9

2 types of cells in dermis

Answer 9

1. fibroblasts

2. mast cells

Question 10

what are fibroblasts

Answer 10

• most abundant

- produce collagen and elastin

Question 11

what are mast cells

Answer 11

immediate hypersensitivity reactions

Question 12

4 other component of dermis

Answer 12

1. blood vessels
2. nerves
3. pilosebacous unti
   - hair follicle
   - sebacous gland
   - smooth muscle
4. sweat glans

Question 13

name 2 sizes of raised superficial lesions

Answer 13

-1 - papule

+1 - plaque

Question 14

name 2 sizes of raised deep lesions

Answer 14

• 1 - nodule

+1 - tumour

Question 15

name 2 sizes of raised lesion with fluid

Answer 15

-1 vesicle

+1 - bullae

Question 16

name 2 sizes of raised lesion with pus

Answer 16

• 1 pustule

+1 - abscess

Question 17

name 2 sizes of raised lesion with halo or central clearing

Answer 17

both wheal or hive

Question 18

name 2 sizes of flat lesions that differ in color from surrounding

Answer 18

-1 macule

+1 - patch