Hair loss characterized by miniaturization of terminal hair that is converted to vellus hair; in men, it is known as male pattern baldness
What is androgenic alopecia
100
Ability of the hair to absorb moisture
What is hair porosity
100
Units that are joined together end-to-end like pop beads by strong, chemical peptide bonds (end bonds) to form the polypeptide chains that comprise proteins
What is amino acid
100
Technical term for brittle hair
What is fragilitas crinium
100
Total loss of scalp hair
What is alopecia totalis
200
Also known as growth phase: phase during which new hair is produced
What is anagen phase
200
The tube-like depression or pocket in the skin or scalp that contains the hair root
What is hair follicle
200
The small, involuntary muscle in the base of the hair follicle
What is arrector pill muscle
200
An amino acid with a sulfur atom (S) that joins together to peptide strands
What is cysteine
200
Ability of the hair to stretch and return to its original length without breaking
What is hair elasticity
300
Boil; acute, localized bacterial infection of the hair follicle that produces constant pain
What is furuncle
300
Technical term for gray hair; results from the loss of the hair's natural melanin pigment
What is canities
300
Plural: dermal papillae. A small, cone-shaped elevation located at the base of the hair follicle that fits into the hair bulb
What is dermal papilla
300
Inflammation of the subcutaneous tissue caused by staphylococci; similar to a furuncle but larger
What is carbuncle
300
Middle layer of the hair; a fibrous protein core formed by elongated cells containing melanin pigment
What is cortex
400
Lowest part of a hair strand; the thickened, club-shaped structure that forms the lower part of the hair root
What is hair bulb
400
Outermost layer of hair; consisting of a single, overlapping layer of transparent, scale-like cells that look like shingles on a roof
What is hair cuticle
400
Provides natural dark brown to black color to the hair and is the dark pigment predominant in black and brunette hair
What is eumelanin
400
The five elements -carbon, oxygen, hydrogen, nitrogen, and sulfur -that make up human hair, skin, tissue, and nails
What is COHNS elements
400
The brief transition Between the growth and resting phases of a hair follicle. It signals the end of the growth phase
What is catagen phase
500
Abnormal hair loss
What is alopecia
500
Tuft of hair that stands straight up
What is cowlick
500
Complete loss of hair loss
What is alopecia universalis
500
The number of individual hair strands on 1 square inch (2.5 square centimeters) of scalp