chapter 11- properties of the hair and scalp

proteins

PROH-teenz

p. 228 Long, coiled complex polypeptides made of amino acids.

ringed hair

p. 237 Variety of canities characterized by alternating bands of gray and pigmented hair throughout the length of the hair strand.

salt bond

P. 228

A weak, physical, cross-link side bond between adjacent polypeptide

Chains.

scutula

SKUCH-ul-uh

p. 240

Dry, sulfur-yellow, cuplike crusts on the scalp in tinea favosa or tinea favus.

sebaceous glands

p. 225 The oil glands in the skin that are connected to the hair follicles.

sebum

p. 225

A fatty or oily substance secreted by the sebaceous glands that lubricates the skin.

side bonds

p. 228

Bonds that cross-link the polypeptide chains together and are responsible for the extreme strength and elasticity of human hair.

telogen phase

TEL-uh-jen FAYZ

p. 233

Also known as resting phase; the final phase in the hair cycle that lasts until the fully grown hair is shed.

terminal hair

TUR-mih-nul HAYR

p. 240

Long, coarse, pigmented hair found on the scalp, legs, arms, and bodies of males and females.

tinea

TIN-ee-uh

р. 240

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

TIN-ee-uh fah-VOH-suh

p. 240

Also known as tinea favus; fungal infection characterized by dry, sulfur-yellow, cuplike crusts on the scalp called scutula.

trichology trih-KAHL-uh-jee

p. 224

Scientific study of hair and its diseases and care.

trichoptilosis

trih-kahp-tih-LOH-sus

p. 238 Technical term for split ends.

trichorrhexis nodosa trik-uh-REK-sis nuh-DOH-suh

p. 238

Technical term for knotted hair; it is characterized by brittleness and the formation of nodular swellings along the hair shaft.

vellus hair

VEL-US HAYR

р. 232

Also known as lanugo hair; short, fine, unpigmented, and downy hair that appears on the body, with the exception of the palms of the hands and the soles of the feet.

wave pattern

p. 230 The shape of the hair strands; described as straight, wavy, curly, and extremely curly.

whorl

WHORL

p. 246 Hair that forms in a circular pattern on the crown of the head.