Hair and Fiber Analysis

What are the three layers of hair?

• Medulla, keratin, cortex

• Cuticle, medulla, keratin

• Keratin, cuticle, cortex

• Medulla, Cortex, and Cuticle

How do you calculate the medullary index?

• Width of the medulla

  Width of the hair

• Width of the hair

  Width of the medulla

• Width of the cortex

  Width of the medulla

• Width of the medulla

  Width of the cortex

What cuticle type is in the picture?

• Coronal

• Imbricate

• Spinous

How can you tell the difference between animal and human?

• Human is imbricate and animal is always spinous.

• Human medullary index is much less.

• Human hair is thinner than animal hair

• Animal hair has a thicker cortex than human.

Tags

NGSS.MS-LS4-2

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

Fibers are classified as either:

• natural fibers or synthetic fibers.
• polymers or synthetic fibers.
• acrylic fibers or plant fibers.
• olefins or synthetic fibers

Tags

NGSS.MS-PS1-3

The following medullary pattern is called

• fragmented 
• continuous
• interrupted/intermittent
• There is no medulla present - absent

The protein that makes up hair is called _____

• ninhydrin
• pigments 
• medulla
• keratin

Tags

NGSS.MS-LS3-1

The deepest layer of hair (compared to the lead of a pencil) is the ___

• medulla
• cortex
• cuticle
• keratin 

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

• medulla
• cortex
• cuticle
• keratin