In permanent waving, the reduction reaction is due to the addition of _____.

All perm wraps begin by sectioning the hair into _____.

The difference in the strength of most chemical hair relaxers is determined by the concentration of _____.

During a relaxer strand test, hair that is pressed to the scalp and continues to curl is _____.

Most acid waves used in salons have a pH value between _____.

Relaxers that contain two components and must be mixed immediately prior to use are _____.

_____ minimizes stress and tension on the hair.

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

What is the main active ingredient in true acid and acid-balanced waving lotions?

In a _____, the hair is wrapped at an angle other than perpendicular to the length of the rod which causes the hair to spiral along the length of the rod.