Intro to hair analysis

Multiple Choice

On average, how many hairs does a person lose per day?

• 10-30

• 40-125

• 200-300

• 150-250

Open Ended

Think-Pair-Share:

Why do you think hair analysis is important in scientific or forensic investigations?

Multiple Choice

Which of the following is NOT a main function of hair?

• Regulating temperature

• Protecting skin

• Aiding in digestion

• Acting as a sensory organ

Multiple Choice

Arrange the following hair growth stages in the correct order: Catagen phase, Anagen phase, Telogen phase.

• Anagen phase, Catagen phase, Telogen phase

• Catagen phase, Anagen phase, Telogen phase

• Telogen phase, Anagen phase, Catagen phase

• Anagen phase, Telogen phase, Catagen phase

Fill in the Blank

Hair consists of two main parts: the follicle and the ___.

Multiple Select

Which of the following statements about keratin is/are correct?

• Keratin is a protein produced in the skin.

• Keratin makes hair strong and flexible.

• Keratin causes hair to decompose quickly.

• Keratin is found only in hair follicles.

​

Open Ended

Think- Pair- Share:

Explain why the information about the cuticles' structure and function is important in forensic investigations.

Multiple Choice

Which layer of the hair shaft is responsible for protecting the inner layers?

• Cuticle

• Cortex

• Medulla

• Pigment

Multiple Select

Which of the following statements about the cortex of hair is/are correct?

• It is the middle part of the shaft.

• It contains most of the pigment granules.

• It is the outermost layer of the hair shaft.

• It makes up the largest part of the hair shaft.

Fill in the Blank

The medulla is the ___ of the hair shaft.