Chapter 20 Chemical Textures

What tough exterior layer of the hair has the purpose of surrounding the inner layers and protecting the hair from damage?

• Hair shaft

• Cuticle

• Cortex

• Medulla

Which layer of the hair is located directly beneath the cuticle layer and is responsible for the incredible strength and elasticity of human hair?

• Hair shaft

• Cuticle

• Cortex

• Medulla

Which layer of hair is the innermost layer of the hair, and often called the pith or core of the hair?

• Hair shaft

• Cuticle

• Cortex

• Medulla

The _____ measures the acidity and alkalinity of a substance by measuring the quantity of hydrogen ions it contains.

• oxygen content

• pH scale

• salinity

• radioactivity level

The range of numbers used in the pH scale is _____.

• 0 to 5

• 0 to 7

• 0 to 10

• 0 to 14

9. Chemical hair texturizers temporarily raise the pH of the hair to an alkaline state in order to _____.

• expand and harden the shaft

• harden and close the shaft

• swell and set the shaft

• soften and swell the shaft

In the restructuring process, coarse, resistant hair with a strong compact cuticle requires a chemical solution that is _____.

• slightly alkaline

• mildly acidic

• strongly acidic

• highly alkaline