A
hair loss occurring in old age
What is ALOPECIA SENILIS?
growth phase in the hair cycle
What is ANAGEN PHASE?
total loss of scalp hair
What is ALOPECIA TOTALIS?
transition phase of the hair growth cycle that signals the end of the growth phase
What is CATAGEN PHASE?
hair loss that occurs before middle age
What is ALOPECIA PREMATURA?
involuntary muscle fiber attached to the base of the hair follicle
What is ARRECTOR PILI?
also known as peptide bonds; chemical bonds that join amino acids end to end
What are END BONDS?
outermost layer of the hair shaft
What is CUTICLE?
small, cone-shaped elevation located at the base of the hair follicle that fits into the hair bulb
What is DERMAL PAPILLA?
tubelike depression in the skin that contains the hair root
What is FOLLICLE?
tuft of hair that stands straight up
What is COWLICK?
hair loss as a result of syphilis
What is ALOPECIA SYPHILITICA?
also known as sulfur bond; a type of chemical cross bond found in the hair cortex
What is DISULFIDE BOND?
complete loss of body hair
What is ALOPECIA UNIVERSALIS?
middle layer of the hair shaft
What is CORTEX?
the sudden falling out of hair in patches or spots - autoimmune disorder
What is ALOPECIA AREATA?
technical term for brittle hair
What is FRAGILITAS CRINIUM?
abnormal hair loss
What is ALOPECIA?
melanin that gives brown and black color to hair
What is EUMELANIN?
the building blocks or units of structure in protein
What are AMINO ACIDS?
also known as barber’s itch; a bacterial infection of the hair follicle with inflamed pustules in the bearded areas of the face and neck; may have hairs growing through the pustule
What is FOLLICULITIS BARBAE?
the result of an acute, deep-seated bacterial infection in the subcutaneous tissue
What is CARBUNCLE?
an amino acid with a sulfur atom that joins together two peptide chains
What is CYSTEINE?
technical term for grey hair
What are CANITIES?
hair loss that occurs as a result of genetics, age, and hormonal changes; male pattern baldness
What is ANDROGENIC ALOPECIA?