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Forensic > Hair And Fiber Evidence > Flashcards

Hair And Fiber Evidence Flashcards

1
Q

What are the 4 functions of hair?

A

Regulates temperature, acts as a sense of organ, protects from sunlight, and decreases friction

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2
Q

What is the continuous medulla type?

A

One unbroken line of color

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3
Q

What is the interrupted medulla type?

A

A pigmented line broken at regular intervals

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4
Q

What is the fragmented medulla type?

A

A pigmented line unevenly spaced

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5
Q

What are 3 cuticle scale patters?

A

Coronal, spinous, and imbricate

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6
Q

What animal has a coronal scale pattern?

A

Small rodents

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7
Q

What animal has a spinous scale pattern?

A

Cats

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8
Q

What animal has a imbricate scale pattern?

A

Deer

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9
Q

How does the presence of a hair root change the forensic value of hair as evidence?

A

Changes the forensics value because it becomes a individual piece of evidence

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10
Q

What is the outside layer of the hair called?

A

Cuticle

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11
Q

What is in between the cuticle and medulla of the hair?

A

Cortex

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12
Q

What is the innermost layer of the hair follicle?

A

Medulla

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13
Q

What are the tiny dots in a hair follicle?

A

Pigment granule

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14
Q

What are the varying shapes in a hair follicle?

A

Cortical fusi

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15
Q

What are the large granules in a hair follicle called?

A

Ovoid body

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16
Q

What is the difference between direct and secondary transfer of fiber evidence?

A

Direct is from the suspect to the victim and secondary is from the scene to the suspect then onto the victim

17
Q

What are 3 ways fiber evidence can be gathered?

A

Special vacuums, sticky tape, and forceps

18
Q

What are the 2 basic categories fibers can be broken into?

A

Natural fibers and synthetic fibers

19
Q

What is a natural fiber?

A

A fiber that comes from natural resources

20
Q

What is a synthetic fiber?

A

A fiber that is man-made

21
Q

What are the 3 subcategories plant fibers can be broken into?

A

Steam fibers such as flax, Leaf fibers like abaca and seed-hair fibers like cotton

22
Q

Advantages of natural fibers

A

Natural fibers can protect against the sun

23
Q

Disadvantage of natural fibers

A

Natural fibers are less durable

24
Q

Advantage of synthetic fibers

A

They are very durable and strong

25
Q

Disadvantage of synthetic fibers

A

Synthetic fibers melt in the sun if left out for too long

Forensic (1 decks)

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