Hair Structure
what is the tube-like depression or pocket in the skin that contains the hair root?
Hair Follicle
Name the COHNS elements
Carbon, Oxygen, Hydrogen, Nitrogen, and Sulfur
What are the four basic types of wave patterns
Straight, Wavy, Curly, Extremely Curly
What are the two main types of hair found on the body?
Vellus and Terminal
Canities is the technical tern for what hair disorder?
Gray Hair
What is the lowest part of a hair strand that is a club shaped structure?
Hair Bulb
Hair is made up of what fibrous protein called what?
Keratin
What are the two types of melanin? What pigment does each one have?
Eumelanin: Dark brown to black
Pheomelanin: Red, ginger to yellow, and blonde
What are the 3 phases in the hair growth cycle and what does the hair do in each phase?
Anagen: Grow
Catagen: Transition
Telogen: Resting
What causes Dandruff?
a fungus called Malassezia that causes dandruff when it gets out of control
What are the 3 parts of the hair shaft?
Name the three side bonds
Hydrogen, Salt, and Disulfide
One theory of what determines a curl pattern is the shape of the hair's cross section. What shape of cross section does straight hair have?
Round
Name some examples of growth patterns
Hair Streams, Whorls, Cowlicks
Tinea is the technical term for what? What is it caused by?
ringworm: caused by a fungal organism, not a parasite
What is the difference between the hair root and hair shaft?
Hair Root: the part of the hair located below the skin
Hair Shaft: the part of the hair located above the surface of the skin
A peptide bond is broken by chemical depilatories and reformed by what?
It cannot be reformed because the hair is dissolved
One theory of what determines a curl pattern is the shape of the hair's cross section. What shape of cross section does wavy or curly hair have?
Oval to Flattened Oval
Abnormal hair loss is call what and is most common in men or women?
Alopecia and Men
Name one parasitic infection that can happen in the hair
Scabies or head lice
What type of hair is the medulla always found in?
Thick, Course hair such as beard hair
Disulfide bonds are broken during a relaxing service and are converted into what bonds?
Lanthionine
One theory of what determines a curl pattern is the shape of the hair's cross section. What shape of cross section does extremely curly hair have?
Flattened
Name 4 treatments for hair loss
OTC topical cream, Oral Prescription, Hair replacement surgery, or non surgical hair replacement such as wigs/ toupees/ weaves/ extensions
Name the technical term for split ends
Trichoptilosis