Chapter 11 - Properties of the Hair and Scalp
Cosmetology Vocabulary
Cosmetology Vocabulary
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proteins
long, coiled complex polypeptides made of amino acids.
ringed hair
variety of canities characterized by alternating bands of gray and pigmented hair though out the length of the hair strand.
salt bond
a weak, physical, cross-link side bond between adjacent polypeptide chains.
scutula
dry, sulfur-yellow, cup-like crests on the scalp in tinea favosa or tinea favus.
side bonds
bonds the cross-link the polypeptide chains together and are responsible for the extreme strength and elastictity of human hair.
telogen phase
also known as resting phase; the final phase in the hair that lasts until fully grown hair is shed.
terminal hair
long, coarse, pigmented hair found on the scalp, legs, arms, and bodies of males and females.
tinea
technical term for ringworm, a contagious condition caused by fungal infection and not a parasite; characterized by itching, scales, and sometimes, painful lesions.
tinea favosa
also known as tinea favus; fungal infection characterized by, dry, sulfur-yellow, cup-like crusts on the scalp called scutula.
trichology
scientific study of hair and its diseases and care.
trichoptilosis
technical term for split ends.
trichorrhexis nodosa
technical term for knotted hair; it is characterized by brittleness and the formation of nodular swellings around the hair shaft.
vellus hair
also known as lanugo hair; short, fine, unpigmented downy hair that appears on the body, with the exception of the palms of the hands and soles of the feet.
wave pattern
the shape of the hair strands; described as straight, wavy, curly, and extremely curly.
whorl
hair that forms in a circular pattern on the crown of the head.
alopecia
abnormal hair loss.
alopecia areata
autoimmune disorder that causes the affected hair follicles to be mistakenly attacked by a person's own immune system; usually begins with one or more small, round, smooth, bald patches on the scalp.
alopecia totalis
total loss of scalp hair.
alopecia universalis
complete loss of body hair.
amino acids
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.
anagen phase
also known as growth phase; phase during which new hair is produced.
androgenic alopecia
also know as androgenetic alopecia; hair loss characterized by miniaturization of terminal hair that is converted to vellus hair; in men, it is known as male pattern baldness.
canities
technical term for gray hair; result from the loss of the hair's natural melanin pigment.
carbuncle
inflammation of the subcutaneous tissue caused by staphylococci; similar to a furuncle but larger.
catagen phase
the brief transition period between the growth and resting phases of a hair follicle. it signals the end of the growth phase.
COHNS elements
the five elements - carbon, oxygen, hydrogen, nitrogen, and sulfur - that make up human hair, skin, tissue, and nails.
cortex
middle layer of the hair; a fiberous protein core formed by elongated containing melanin pigment.
cowlick
tuft of hair that stands straight up.
cysteine
an amino acid joined with another cysteine amino acid to create cystine amino acid.
cystine
an amino acid that joins together two peptide strands.
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