Hair Analysis 2: Basic Information Flashcards Preview

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Flashcards in Hair Analysis 2: Basic Information Deck (18)
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1

Hair consists of a __ produced by a ___ embedded in the skin.

Hair shaft, Follicle

2

The cuticle is the outermost layer that...

•is made of overlapping scales
•protects inner layers
•is used to ID species

3

The thickest layer of skin is the ____. It gives hair....

Cortex
-gives hair it's color

4

Hair on mammals regulates_____

Body temperature

5

The _____of hair can be circular, triangular, irregular, or flattened influencing the curl of the hair.

Cross-section

6

The five medulla patterns are...

•continuous
•intermittent/ interrupted
•fragmented/ segmented
•solid
•none

7

Only race known to have continuous medulla

Mongoloid (Asian)

8

Anagen Stage

Hair actively grows

9

Catagen Stage

Hair grows and changes

10

Telogen Stage

Hairs easily lost; follicles dormant

11

In animals, the medulla is much thicker than in humans. This represents the difference in the _____.

Medullary Index

12

Cuticle patterns:

•Spinous ((resembles petals))

•Coronal ((resembles stack of crowns))

•Imbricare ((found in humans; often flattened and narrow))

13

Macroscopic investigation....

Examines color, length, curliness

14

Microscopic Investigation....

Indicates fine detail of hair structure

15

_____microscopy can show the presence of dye/ other treatments

Phase-Contrast

16

______microscopes provide now detail of the surface or interior of the sample.

Electron

17

Roots may contain a_____.

Follicular tag

18

Can determine concentrations of substances in the hair sample.

NAA: Neutron Activation Analysis