Cosmetology Human Hair

______ give you the ability to permanently change the hair's natural wave and curl pattern, thereby offering clients a variety of styling options that would not otherwise be possible.

• chemical hair softening

• chemical texture services

• natural hair services

• alternative texture services

Without a thorough understanding of _____, cosmetologists could damage hair, cause hair loss, and harm their clients and themselves.

• chemistry
• color theory
• immunology
• branding

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 term ph is an abbreviation used for potential ______, and the symbol ph represents the quantity of _________ ions in solution.

• hydrogen; hydrogen

• hydrogen; oxygen

• oxygen; oxygen

• oxygen; nitrogen

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

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