Trichology Flashcards
The technical term for the study of hair is called…
Trichology
When looking through a microscope, which portion of the hair would display living cells?
Hair bulb
Hair grows from a tube-like “pocket” called a follicle or a/an
Root sheath
The diameter of the hair fiber will be the same as…
The inside diameter of the hair follicle
What is the natural flow of hair determined by?
The angle of the follicle
The primary parts of the hair are the fiber and the…
Hair root
What resembles the shape of a golf club and covers the follicle at the lower portion of the hair root?
Bulb
Located at the bottom of the follicle and supplying nourishment to the germinal matrix is the…
Papilla
The three major layers of the hair are…
Medulla, cortex, and cuticle
The pigment that gives hair it’s color is found primarily in the…
Cortex
The layer of hair consisting of unique protein structures that give hair most of its pigment and strength (elasticity) is called the…
Cortex
The outer covering of the hair shaft made up of overlapping layers of transparent scales is called the…
Cuticle
Hair that has been pulled out from the roots can grow back under what circumstance?
The papilla has not been destroyed.
The central core of the hair shaft sometimes missing in fine or very fine hair is called the…
Medulla
What helps protect the hair and skin from becoming too dry?
Sebum
Oil glands are attached to the side of the…
Root sheath/follicle
What is formed when sebum produced by the oil glands mixes with the body’s perspiration?
Acid mantle
The muscle that causes the hair to stand on end when a person is scared or cold is known as the…
Arrector pili
Hair is made up primarily of…
Protein
Active growing stage of hair
Anagen stage
The active growing stage of hair lasts how long?
2-6 years
Catagen, a brief transitional stage of hair growth, lasts for what amount of time?
Only a few weeks
The hair growth stage when all cell division stops is the…
Catagen stage
The resting stage of hair growth when the hair bulb has no attached root sheath is referred to as…
Telogen stage
Human hair, on average, grows about how much per month?
1/2”
The lips, soles of feet, palms of hands and eyelids do not have…
Hair
What is the technical term for eyelash hair?
Cilia
What is the hard, resistant layer of protein that protects the hair shaft?
Cuticle
The cross-section, or diameter, of the hair shaft is much larger in coarse hair than what type of hair?
Fine hair
The large variety of hair color is influenced by the amount, size, type and distribution of…
Eumelanin and pheomelanin
Gray hair is caused by…
Reduced color pigment, melanin, in the cortex of the hair
The process of hair turning gray is usually caused by…
Natural aging process
Degree of coarseness or fineness of the hair fiber is referred to as…
Texture
Number of active hair follicles per square inch on the scalp refers to…
Density
Ability of hair to absorb moisture, liquids or chemicals is known as…
Porosity
If the layers of the cuticle are very close together, the hair has what type of porosity?
Resistant
Hair that has been damaged by the environment or overprocessed has what type of porosity?
Extreme
Wet hair is able to be stretched to what percent of its length?
40%-50%
Small cracks starting at the cuticle and splitting the hair entirely are known as brittle hair, fragilitis crinium or…
Trichoptilosis
Lumps or swelling along the hair shaft is known as knotted hair, nodosa, or…
Trichorrhexis
Condition in which alternating bands of gray and dark hair exist
Ringed hair
Abnormal coverage of hair on areas of the body where normally only lanugo or baby-fine hair appears is a condition known as…
Hypertrichosis
A condition in which beads or nodes form on the hair shaft is called…
Monilethrix
Chronic scalp condition with excessive flaking that accumulates in the scalp or falls to the shoulders is known as dandruff or…
Pityriasis
Dry flakes attached to the scalp or on the hair, which can appear translucent are called…
Pityriasis capitis simplex
What are the main purposes of hair?
Adornment, protection
