UNIT 5: Hair & Fibers Review

The central core of the hair is called the...?

• Medulla
• Cuticle
• Cortex
• Shaft

Human hairs generally have what two types of medulla?

• Continuous or interrupted
• Fragmented or none
• Solid or interrupted
• Fragmented or solid

The average hair grows how much per month?

• 1.3 cm
• 2.4 cm
• .5 cm
• 3.2 cm

The best method to pick up hairs over a large surface area is...?

• gloves
• forceps
• tape lift
• vacuum

The hair follicle is dormant and hairs are easily lost during which stage of the hair life cycle?

• Anagen
• Telogen
• Catagen
• Metagen

The transitional or regressive stage that lasts a few weeks during which hair growth slows is called...?

• Anagen
• Telogen
• Catagen
• Metagen

In order to determine if a hair is from an animal or human, one should divide the diameter of the...

• medulla by the entire hair
• medulla by the cortex
• cortex by the medulla
• cortex by the entire hair

Hair is helpful in solving old crimes because…

• hair on a suspect never changes
• hair always contains DNA evidence
• hair takes little room to store in evidence closets
• hair does not easily decompose

The hair shaft is composed of what important protein?

• Cellulose 
• Chitin
• Peptidoglycan
• Keratin

Hair analysis may be used to determine all of the following except:

• manner in which the hair was removed
• body region from which the hair came from
• broad racial background of the individual from which the hair came from
• identity of the individual from which the hair came from