COX Cosmetology Chapter 11 Part#2

The major elements that make up human hair are carbon, oxygen, hydrogen, nitrogen, and sulfur, often referred to as _____.

• COHNS elements

• dermal foundation

• amino acids

  
  

• keratins

The units of structure that build protein and are joined together end to end like pop beads are _____.

• oxygenated cells

• primary acids

• amino acids

• lymph glands

Hair is approximately _____ percent protein.

• 30

• 50

• 70

• 90

What substances are comprised of long, coiled, complex polypeptides made of amino acids?

• Proteins

• Carbohydrates

• Keratins

• Melanin

The three different types of side bonds that link chains of amino acids together are _____.

• oxygen, hydrogen, and salt

• hydrogen, ionic, and carbon

• ionic, helix, and disulfide

• hydrogen, salt, and disulfide

A physical side bond that is easily broken by water and heat is a _____ bond.

• nitrogen

• hydrogen

• disulfide

• sulfur

What type of bond is broken by wetting the hair with water and is reformed when the hair dries

• Salt bond

• Hydrogen bond

• Disulfide bond

• Peptide bond

A weak, physical, cross-link side bond between adjacent polypeptide chains that is broken by changes in pH is a _____ bond.

• hydrogen

• carbon

• salt

• sulfur

Permanent waving and hair relaxers change the shape of hair by chemically altering the hair’s _____.

• hydrogen bonds

• ionic bonds

• disulfide bonds

• amino acids

Hydroxide chemical relaxers break disulfide bonds and convert them to _____ bonds.

• lanthionine

• sulfur

• carbon

• hydrogen