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

The name for man-made fibers is:

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

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 hair shapes in cross-section?

• square
• round
• oval
• crescent moon

In which phase of hair growth is hair actively growing?

• anagen
• catagen
• telogen
• melanen

Which phase of hair growth is the final phase of hair growth that results in hair loss and lasts about three months?

• anagen
• catagen
• telogen
• melanen