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Cosmetology - Properties of Hair and Scalp


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The scientific study of the hair, its diseases, and its care.
The 2 main divisions of the hair are the hair root and the ___ ____.
Hair Shaft
The three main structures associated with the hair root.
Follicle, Bulb, and Dermal papilla
The hair root is contained in a tube-like depression or pocket in the skin called the ____.
The club-shaped structure that forms the lower part of the hair root.
Hair Bulb
The blood and nerve supply that provides nutrients needed for hair growth are contained in the ___ ___.
Dermal Papilla
The tiny involuntary muscle in the skin that contracts and causes "goose bumps"
Arrector Pili
The oily substance called sebum is secreted by the ___ ___.
Sebaceous Glands
The 3 layers of the hair shaft.
Cuticle, Cortex, and Medulla
The layer of the hair shaft that protects it from penetration and damage.
Genrally only thick coarse hair contains a _____.
About 90% of the total weightof hair comes from the ___.
Liquids can penetrate the hair only when the ___ are raised.
In order to penetrate the cuticle layer and reach the cortex, oxidation haircolors, perm solutions, and chemical relaxers must have What?
An Alkaline pH
The changes that take place in the hair during permanent waving, chemical relaxing, and oxidation hair coloring occur in the ____.
As living cells of the hair mature, they fill up with a protein called ___.
The elements that make up the amino acids in the hair are carbon, nitrogen, hydrogen, ____ and ____.
Oxygen and Sulfur
Of the 5 elements found in the hair, the element that makes up the highest percentage is ____.
The chemical bonds that join amino acids to each other are called ___ ____.
Peptide Bonds
The bonds that account for the strength and elasticity of hair are the ___ ___.
Side Bonds
There are 3 different types of side bonds in the cortex; name the 3.
Hydrogen, salt, and disulfide bonds
The strongest side bonds in the cortex are the ___ ___.
Disulfide Bonds
A Disulfide bond joins the ____ atoms of 2 neighboring cysteine amino acids to create cystine.
Disulfide bonds can be broken by ___ and ____.
Perms and Relaxers
A hydrogen bond is a physical bond that is easily broken by ____ or ___.
Water or heat
All natural color is based on the ratio of ____ to ____.
Eumelanin to Pheomelanin
The pigment that provides natural hair colors from red and ginger to yellow/blonde is _____.
All natural hair color is the result of the pigment located within the ____.
The amount of movement in the hair strand is referred to as its ____ ____.
Wave Pattern
A cross-section of a wavy hair strand is usually ____.
Extremely curly hair that forms coils usually has what?
A fine texture
The 4 most important factors to consider in a hair analysis includes ____, ____, and ____.
Elasticity, Porosity, and Texture
Hair texture is defined as the hair's ____.
The hair's ability to absorb moisture is its _____.
____ hair has the largest diameter.
The hair texture that is the most susceptible to damage from chemical services is ___.
The number of individual hair strands on 1 square inch of scalp is referred to as ____.
The number of hairs on the head generally varies with the _____ .
Color of the Hair
The thickest hair (highest density) is generally found among people with ___ hair.
Hair with low porosity is considered ____.
Hair with high Porosity is generally the result of what?
Wet hair with normal elasticity will stretch up to ___ of its original length and return to that same length without breaking.
Hair flowing in the same direction is called a ____ ____.
Hair Stream
Dry hair and scalp are caused by what?
Inactive Sebaceous Glands
Found on infants, Lacking medulla, and not pigmented are characteristics of ___ hair.
Hormonal changes during puberty cause some areas of vellus hair to be replaced with _____ hair.
The 3 phases of hair growth are anagen, catagen, and ____.
The growth phase of the hair growth cycle is known as ____.
The follicle canal shrinks and detaches from the dermal papilla during this phase.
Catagen Phase
About ____% of the scalp hair growing in the anagen phase at any one time.
The phase of hair growth that lasts the shortest length of time is the _____ phase.
The resting phase of the hair growth cycle is known as the ____ phase.
About ___ % of the hair is in the resting phase at any one time.
Myth or Not? - Scalp massages increase hair growth
Gray hair is exactly like pigmented hair except it lacks ____.
A loss of 35 to 40 hairs a day is considered ____.
Abnormal hair loss is called ____.
A client's hair must be ____ before any servicing.
By the age of 35, almost ___% of men and women show some hair loss.
In men, a horseshoe-shaped fringe of hair is referred to as what?
Male Pattern Baldness
A miniaturization of terminal hair contributes to what?
Postpartum Alopecia
A type of Alopecia characterized by the sudden falling out of hair in round patches or baldness in spots is called ____ ____.
Alopecia Areata
In women, androgenic alopecia shows up as what?
General thinning of the Crown Hair
Hair loss at the end of pregnancy is called ____ ____.
Postpartum Alopecia
A topical medication applied to the scalp that has been proven to stimulate hair growth is ____.
Of the 2 products proven to stimulate hair growth, the oral prescription drug is ____.
Finasteride is not prescribed for women because if the high risk for ___ ____.
Birth Defects
Among the treatments for hair loss, hair plugs are a ____ treatment.
Hair plugs may be transplanted by a ____.
The techincal term for gray hair is ___.
The type of Canities that exists at or before birth is called ____ ____.
Congenital Canities
The type of Canities that results from age or genetics is called ____ _____.
Acquired Canities
Ringed hair is a variety of ____.
The technical term for beaded hair is ____.
The technical term for split ends is ____.
Abnormal growth of hair is called ____.
A condition characterized by brittleness and nodular swellings along the hair shaft is _____ _____.
Trichorrhexis Nodosa
Wax hair removal, tweezing, shaving, and electrolysis are among the treatment for _____.
The condition in which the hairs may split at any part of their length is called ____ ____.
Fragilitas Crinium
Dry dandruff, thin scales, and an itchy scalp are typical of ___ ___ ___.
Pityriasis Capitis Simplex
Pityrasis steatoides is a scalp inflammation marked by greasy or waxy ____.
Clients with tinea capitis should be what?
Referred to a physician
Tinea, or ringworm, is caused by what?
Vegetable Parasites
Ringworm of the scalp is also known by the technical term ___ ____.
Tinea Capitis
Dry, Sulfur-yellow, cuplike crusts on the scalp, called scutula, are characteristic of ___ ____.
Tinea Favosa
The contagious skin disease caused by the itch mite burrowing under the skin is known as ____.
Pediculosis Capitis is the infestation of the hair and scalp with ___ ____.
Head Lice
A boil is also known as a ___.
An inflammation of the subcutaneous tissue caused by staphylococci is called ____.
Preventing the spread of Tinea, Pityriasis, and Staphylococci infections involves proper what?
Sanitation and Disinfection

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