The active ingredient in all hydroxide relaxers is the: 

The water-attracting head of the surfactant molecule is: 

Lines in haircutting that are parallel to the horizon, or the floor are: 

A colorless polish layer applied to the natural nail to improve the adhesion of polish is a: 

The lipophilic tail of a surfactant molecule is considered to be: 

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

The ability of the hair to absorb moisture is: 

The part of the head that is found by placing a comb flat on the side of the head is the: 

Hydroxide relaxers remove a sulfur atom from a disulfide bond, converting it into a(n): 

A basic haircut where the hair is cut at a 180-degree angle is the: