11. Hair And Scalp Flashcards
Tricholigy
THe scientific study of hair, it’s disease and care
Mature strand
Two parts are the hairs roots and hair shaft of human hair
Hair follicle
The tube like depression or pocket in the skin or scalp that contains the hair root
Hair follicles
Are not found in the soles of the feet
Arrector pili muscle
The small involuntary muscle in the base of the hair follicle
Sebum
The darth or oily substance secreted by the sebaceous glands
Healthy cuticle
For chemicals to penetrate the hair layer must have the alkaline pit
Medulla
Composed of round cells
Anlagen phase
New hair is produced Becuase new cells are actively manufactured in the hair follicle
Anagen phase
New hair is produced because new cells are actively manufactured in the hair follicle
Major elements
That make up human hair are carbon oxygen hydrogen nitrogen and sulfur
Peptide bonds
The strong chemical bonds that Join amino acids
Pheomelanin
Provides natural colors ranging from red and finger to yellow and blond tones
Asians
Tend to have extremely straight hair
Minimize tangles
Use a detangling rinse when shampooing extremely curly hair
Hair texture
Classified as course medium or fine
Hair density
The measurement of the number of individual hair strands on kne square inch of the scalp
Chemical services
Performed on hair with low proprietary required more alanine solutions
Wet hair
With normal elasticity will stretch up to 50% of its original length and return to that length with out breaking
Normalizing shampoo
Can treat oily hair and scalp by properly washing
Vellus
Type of hair that almost never has a medulla
Cartagena phase
The follicle canal shrink and detach from the dermal papilla
Healthy scalp
The average growth is 1/2” per mo
Canities
Grey hair
Hypertrichosis
A condition of abnormal growth of terminal hair in areas of the body that normally grow only Vellus hair
Pityriasis
Dandruff
Dermal papilla
One of the main structures of the hair root that contains the blood and nerve supply that provides the nutrients needed for hair growth
Salt bonds
Account for about 1/3 of the hairs overall strength
Anlagen phase
Generally lasts from 3 to 5 years
Scalp hair
Grows faster on woman than on men
Catagen phase
The follicle canal shrank and detach from the dermal papilla
Scalp massage
Does not increase hair growth g
Gray hair
Exactly the same as pigmented hair
Cross sections
Of hair can be almost any shape
Bald men
Commonly perceived as less successful
By age 35
Almost 40% of both men and woman show some degree of hair loss
Finasteride
Oral prescription medication for hair loss that is meant for men only
Congenital Canities
Exsist at or before birth
Dandruff
Can easily be mistaken for dry scalp; result of fungus
Keratinization
When the living cells of hair form and begin their journey upward through the hair follicle and they mature in a process
Tinea
Characterized by itching, scales and sometimes painful circular lesions
Pediculosis capitis
Head lice
Carbuncle
Similar to a furuncle but is larger
Fine hair
Is more fragile than course or medium hair
Course hair
Stronger than fine hair
Hair cuticle
The outermost layer of the hair
Sebaceous gland
The oil glands in the skin that are connected to the hair follicles
Hydrogen bonds
A weak physical cross link side bond easily broken by water or heat
Hair
Approx 90% protein
Alopecia totalis
Total scalp hair loss
Hypertrichosis
Another name is hirsuties
Malassezia
The naturally occurring fungus that causes the symptoms of dandruff when it grows out of control
Hair bulb
The lowest part of the hair strand
Monilethrix
Beaded hair
Scabies
A highly contagious skin disease cause by a parasite called a more that borrows under the skin
Helix
Spiral shape of a coil pattern
Hair growth
Is not effected by shaving, clipping or cutting the hair on the head
Scutula
Dry sulfer- yellow, crusts on the scalp
Integumentary system
Hair skin nails and glands are part of this system
Terminal hair
The long course pigmented hair found in the scalp legs arms and bodies of males and females
Trichorrhexis nodosa
Knotted hair
Medulla
The innermost layer of the hair and is composed of round cells
Whorl
When hair leaves the follicles at the angle and forms patterns or streams on the head
Cowlick
A particular pattern of hair stream that is aurally more noticeable on the front hairline in people with short thick hair
Hair porosity
The ability of the hair to absorb moisture
Cortex
The middle layer of the hair
Alopecia areata
An auto immune disorder that causes the affected hair follicles to be mistakenly attacked by a persons own immune system
Vellus hair
Lanugo hair
Tinea
Ring worm