Chapter 15 Relaxers

Which chemical bonds, also known as end bonds, join amino acids together, end-to-end in long chains, to form a polypeptide chain?

• 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

The cortex of the hair is made up of millions of polypeptide chains cross-linked by three types of side bonds that are responsible for the elasticity and strength of the hair. These bonds are _____.

• disulfide, trisulfide, and hydrogen

• disulfide, salt, and hydrogen

• disulfide, salt, and oxygen

• disulfide, chlorine, and hydrogen

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

• Disulfide bonds

• Peptide bonds

• Keratin bonds

• Amino acids

Which bonds are relatively weak physical side bonds resulting from an attraction between negative and positive electrical charges, and are easily broken by changes in pH?

• Disulfide bonds

• Salt bonds

• Hydrogen bonds

• Keratin proteins

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

• stretched

• dried

• softened

• styled

Chemical services should not be performed if the scalp analysis shows any signs of _____.

• porosity

• abrasions

• disorders

• tightness

Hair that has been treated with a hydroxide relaxer is unfit for _____ and will not hold a curl.

• color services

• a haircut

• permanent waving

• wig fitting

_____, often found in home haircoloring products, leave a coating on the hair that may cause uneven curls, severe discoloration, or hair breakage.

• Peroxide

• Waving solution

• Ammonia

• Metallic salts

What is the active ingredient in all hydroxide relaxers?

• Hydrogen ion

• Keratin ion

• Peroxide ion

• Lithium ion