Ch. 11 Trace Evidence I- Hair

Pigment is what gives hair it's ____________.

• strength

• texture

• color

• DNA

Tags

NGSS.MS-LS3-1

Keratin is the protein that is the primary component of _____________.

• bones

• fiber

• DNA

• hair

What is the medulla?

• the central core of the hair shaft that may be absent in some species

• the protein rich structure around the central core of the hair shaft that contains pigment

• the outer covering of the hair shaft that is composed of overlapping scales

• part of the brain

What is the cortex?

• the central core of the hair shaft that may be absent in some species

• the protein rich structure around the central core of the hair shaft that contains pigment

• the outer covering of the hair shaft that is composed of overlapping scales

• part of the brain

What is the cuticle?

• the central part of the hair shaft that may be absent in some species

• the protein rich structure around the central core of the hair shaft that contains pigment

• the outer covering of the hair shaft that is composed of overlapping scales

• part of the fingernail

How is the structure of hair compared to that of a pencil?

While examining the characteristics of the cuticle and medulla can be important for distinguishing hairs of different species, these characteristics are not useful in differentiating between hairs of different ___________.

• people

• species

• body parts

• dogs

What is the growth phase of hair?

• anagen

• catagen

• telogen

• anaphase

What is the catagen phase of hair growth?

• the initial growth phase during which the hair follicle actively produces hair

• a transition stage between anagen and telogen phase of hair growth

• the final growth phase in which hair naturally falls out of the skin

• when cats grow a lot of hair and make hairballs

The final growth phase in which hair naturally falls out of the skin is the ________________ phase.

• anagen

• catagen

• telogen

• telophase