Hair and Fibers

The protein that makes up hair is called _____

• ninhydrin
• pigments 
• medulla
• keratin

The smallest unit of textile material that has a length many times greater than its diameter is..

• keratin 
• cuticles
• fibers
• chromatography

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

The outside layer of a hair (compared to the ink on a pencil) is the ___

• medulla
• cortex
• cuticle
• keratin

Which is NOT a characteristic of the medulla that varies and therefore should be observed?

• scales
• opacity 
• thickness
• continuity 

Which of the following is NOT one of the characteristics of the cuticle that varies and should be observed?

• scales
•  continuity 
• pigment
• thickness

Which layer of hair is the most important component when determining which individual human the hair came from?

• medulla
• cortex
• cuticle

The name for man-made fibers is:

• processed fibers
• synthetic fibers
• natural fibers
• modified fibers

Which of the following types of medullas are NOT commonly found in human hair?

• continuous
• absent
• interrupted
• fragmented