terms/Definitions
The scientific study of hair and its diseases and care is called?
Trichology
The major elements that make up human hair are carbon, oxygen, hydrogen, nitrogen and sulfur are also referred to as?
COHNS elements
The thickness or diameter of the individual hair strand
Hair texture
The tiny grains of pigment in the cortex that give natural hair color
Melanin
What is eumelanin ?
Provides natural dark brown to black hair color to the hair
Vellus hair is also known as?
Lanugo hair
Define side bonds
Bonds that cross link the polypeptide chains together and are responsible for the extra strength and elasticity of human hair
What Measures the number of individual hair strands on one square inch ?
Hair density
Outer most layer of the hair
Hair cuticle
Define Pheomelanin
Provides natural colors to the hair ranging from red to ginger and yellow and blonde tones
Technical term of dandruff
Pityriasis
The bonds created when disulfide bonds are broken by hydroxide chemical hair relaxers after the relaxer is rinsed from the hair
Lanthionine bonds
The ability of the hair to absorb moisture
Hair porosity
the tube like depression or pocket in the skin or scalp that contains the hair root
hair follice
The shape of the hair stands described as straight, wavy, curly and extremely curly
Wave pattern
Technical term for split ends
Trichoptilosis
what is a weak physical cross link side bond that is easily broken by water or heat
Hydrogen bond
What is the ability of the hair to stretch and return to its original length without breaking?
Hair elasticity
The part of the hair located below the surface of the epidermis
Hair root
define proteins
Long coiled complex polypeptides made of amino acids
Dry, sulfur yellow, cup like crust on the scalp in Tinea favosa or Tinea favus
Scutula
Define salt bonds
Is also a weak physical cross link side bonds That are easily broken by strong alkaline or acidic solutions
Trichorrhexis nodosa
The portion of the hair that projects above the epidermis
Hair shaft
Technical term for beaded hair
Monilethrix