Hair Practice

Hair is composed mostly of the protein

• lignin
• collagen
• keratin
• cellulose

The Cuticle primarily helps determine the ___________ of the source of hair

• age

• species

• ethnicity

• Gender

The woman below has curly hair. Which of the following shapes is most likely the cross section of her hair?

• A

• B

• C

• D

You have found a hair at the crime scene. There are no follicle cells attached, and the root looks undamaged. It was likely in this stage when it came out of the head...

• Anagen - the hair fell out on its own

• Catagen - the hair fell out on its own

• Telogen - the hair fell out on its own

• Don't choose this one.

In June, Forensic Toxicologists take a sample of John Doe's hair from his head, shown below. Each section represents one month of growth. Lead is found in the location of the arrow. Was this a lethal (deadly) dose of lead? What month was he poisoned? 

• no, this was not a lethal dose, he was poisoned in May

• no, this was not a lethal dose, he was poisoned in July

• yes, this was a lethal dose, the was poisoned in May

• yes, this was a lethal dose, he was poisoned in July

You observe a sample of dog hair under the microscope. Some hairs are thick while others are thin. The thin hairs are most likely...

• Whisker Hair

• Undercoat Hair

• Gaurd Hair

• Summer Hair

The center-most part of a strand of hair is known as 

• the cortex
• the medulla
• the cuticle
• the lead

What Kind of Medulla is this?

• Amorphous

• Lattice

• Uniserial

• aeriform

The middle layer of a hair (compared to the wood of a pencil) is the __

• medulla
• cortex
• cuticle
• keratin

You find a hair with coronal cuticle. This hair could be...

• Bat

• Dog

• Deer

• Mammoth