Milady Chapter 20

Without a thorough of ________, cosmetologists could damage hair, cause hair loss, & harm their clients & themselves.

• chemistry

• immunology

• color theory

• branding

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

• Hair shaft

• Cuticle

• Cortex

• Medulla

The term pH is an abbreviation used for potential _______, & the symbol pH represents the quantity of ________ ions in solution.

• hydrogen; hydrogen

• hydrogen; oxygen

• oxygen; oxygen

• oxygen; nitrogen

The range of numbers used in the pH scale is:

• 0 to 5

• 0 to 7

• 0 to 10

• 0 to 14

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

Which compounds are made up of carbon, oxygen, hydrogen, nitrogen, & sulfur?

• Amino acids

• Peptide bonds

• Polypeptide chains

• Keratin proteins

What are long, coiled polypeptide chains linked together end-to-end like beads?

• Amino acids

• Peptide bonds

• Polypeptide chains

• Keratin proteins

What chemical side bonds are formed when two sulfur-type chains are joined together?

• Disulfide bonds

• Peptide bonds

• Keratin bonds

• Amino acids

Hydrogen bonds are weak physical side bonds that result from an attraction between negative & positive electrical charges & are easily broken by water or heat, but reform as the hair is:

• stretched

• dried

• softened

• styled

What determines the size of the curl in a permanent waving process?

• The size of the rod

• The length of the hair

• The texture of the hair

• The color of the hair