Ridgeology

Question 1

What are the two factors that ensure the persistence of friction ridge structures?

Answer 1

1) basal cell mitosis - cell replacement
2)structural elements (4 of them)

Question 2

What are the 4 structural elements?

Answer 2

1)Desmosomes- newly generated basal cells - bound and rise to surface

2) basement membrane- basal cells bound to basement membrane

3) dermal papillae- located on the surface of the dermis, they fit into pockets on underside of epidermis beside primary ridges

4)sweat glands- they penetrate through the epidermis and anchor to dermis or hypodermis

Question 3

What are the two functions of assessing clarity?

Answer 3

1) Level of detail - level 1/2/3
2) Level of tolerance for differences

Question 4

What are the three levels of detail?

Answer 4

Level 1- friction ridge FLOW, PATTERN TYPE, MORPHOLOGICAL info

Level 2- individual frictions ridge PATHS and associated EVENTS

Level 3- WIDTH, SHAPES, PORES (dimensional attributes)

Question 5

Regarding friction skin development, the time of differentiation occurs between … and … weeks. During this time, …….ridges begin to appear and ….ridge development ceases in those areas

Answer 5

15-17 weeks

Secondary, primary

Question 6

List the 3 general fingerprint patters according to SWGFAST

Answer 6

Loop. Whorl. Arch

Question 7

Cells are generated in the ….layer of the epidermis and sloughed away from the … layer

Answer 7

Basal. Horny

Question 8

The major or primary flexion creases are already established when friction ridges begin to grow. T or F

Answer 8

T