1
Study of hair and its diseases
Tricology
What are the three main layers of hair shaft?
cuticle , cortex , medulla
wave pattern refers to
the shape of the hair strand
short, fine, unpigmented, found on the body on parts normally considered hairless is
vellus hair
hair loss in SPOTS, usually in round or irregular patches without inflammation is called?
Alopecia Areata
hair shaft is located
above the epidermis
which structure contains natural pigment
cortex
melanin is tiny grains of pigments located in the
cortex
long, coarse, pigmented hair found on scalp, legs, arms, both male & female is
terminal hair
Minoxidil and Finasteride are what?
FDA approved treatments to stimulate hair growth
Hair follicle are like
depression or pocket
there's 20 animo acids in hair how many should be obtained from a diet
9
salt bond is weak physical cross link bond that is broken by
alkaline or acidic solutions
What is the growth phase called?
The longer this phase is, the longer a person's hair can grow..
anagen phase
what is the technical term for splits ends?
trichoptilosis
Where hair roots are located where?
Below the epidermis
which major element in hair has the lowest percentage?
sulfur
pheomelanin provides natural colors ranging from
red ginger yellow and blonde tones
the brief transition period of hair growth
catagen phase
what is the technical term for knotted hair?
Trichorrhexis nodosa
Arrector pili muscles is
small, involuntary muscle in the base of the hair follicle
hair cells in the hair bulb are filled with?
protein
the shape of the cross section of extremely curly hair is
flattened cross section
What is the resting phase, final phase in the hair growth cycle?
Telogen phase
what is the technical term for gray hair
Canities