CHEM 101 Test 2 Hair Chapter
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1
What are the 3 parts of hair?
Cuticle(thin layer surrounds the core of hair), Cortex(bulk of hair, where must pigment is located), Medulla (inner core of hair, colorless and clear).
2
What are the 3 sections of hair?
Tip, shaft, root.
3
How can you identify the species from hair?
Scale pattern and medulla pattern.
4
What does medulla make up in human and animal hair?
less than 1/3 in human hair, over 1/2 in animal hair.
5
What is the scale pattern of human hair?
Imbricate
6
What are the 3 growth phases of hair?
Anagen, Catagen and telogen
7
When may a follicular tag be present?
Tissue or skin cells present around root, present if hair was pulled out during anagen or catagen phase.
8
What can be determined from hair?
Growth phase, if forcibly removed, race, body region, post mortem, dye or hairspray present.
9
How to calculate Medullary index?
Medulla diameter/shaft diameter
10
What is the purpose of combing hair from corpse at crime scene?
Look for foreign hairs.
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