The chemical texture service that loosens overly curly hair or changes tightly curly or coiled hair into loose curls or waves is

• curl softening

• curl re-forming

• alternate waving

• swelling compound

The layer of the hair that provides the strength and elasticity of human hair is the _____________.

• medulla

• regular

• cortex

• arrector

The natural pH of hair is between____________.

• 4.0 and 5.0

• 4.5 and 5.5

• 6.0 and 7.0

• 7.0 and 8.0

In permanent waving, the size of the curl is determined by the __________.

• position of the rod

• length of the hair

• wrapping of the rod

• size of the rod

A reduction reaction involves either the addition of hydrogen or the removal of ______________.

• oxygen

• peroxide

• carbon

• nitrogen

The three separate components of acid waves are permanent waving solution, activator, and ____________.

• conditioner

• stabilizer

• neutralizer

• shampoo

Permanent wave solution should be rinsed from the hair for at least ________.

• 2 minutes

• 10 minutes

• 15 minutes

• 5 minutes

The process of rearranging the structure of curly hair into a straighter or smoother form is __________.

• chemical hair relaxing

• chemical smoothing

• continuation

• neutralizing

Thio relaxers usually have a pH above_____________.

• 5

• 10

• 9

• 6

Which type of bonds are relatively weak physical side bonds that are the result of an attraction between negative and positive electrical charge?

• Disulfide bonds

• Polypeptide bonds

• Hydrogen bonds

• waving bonds