Chapter 18

Question 0

Catagen

Answer 0

Second transition stage of hair growth; in the Catagen stage, the hair shaft grows upward and detaches itself from the bulb.

Question 1

Anagen

Answer 1

First stage of hair growth during which new hair is produced.

Question 2

Depilation

Answer 2

Process of removing hair at skin level.

Question 3

Electrolysis

Answer 3

Removal of hair by means of an electric current that destroys the hair root.

Question 4

Depilatory

Answer 4

Substance, usually a caustic alkali preparation, used for temporarily removing superfluous hair by dissolving hair at skin level.

Question 5

Epilation

Answer 5

Removes hairs from the follicles; waxing or tweezing.

Question 6

Hair bulb

Answer 6

Swelling at the base of the follicle that provides the hair with nourishment; it is a thick, club-shaped structure that forms the lower part of the hair root.

Question 7

Hair follicle

Answer 7

Mass of epidermal cells forming a small tube, or canal; the tube-like depression or pocket in the skin or scalp that contains the hair root.

Question 8

Hair papilla (papillae)

Answer 8

Cone-shaped elevations at the base of the follicle that fit into the hair bulb. The papillae are filled with tissue that contains the blood vessels and cells necessary for hair growth and follicle nourishment.

Question 9

Hair root

Answer 9

Anchors hair to the skin cells and is part of the hair located at the bottom of the follicle below the surface or the skin; part of the hair that lies within the follicle at its base, where the hair grows.

Question 10

Hair shaft

Answer 10

Portion of the hair that extends or projects beyond the skin, consisting of the outer layer (cuticle), inner layer (medulla), and middle layer (cortex). Color changes happen in the cortex.

Question 11

Hirsutism

Answer 11

Growth of an unusual amount of hair on parts of the body normally bearing only downy hair, such as the face, arms, and legs of women or the backs of men.

Question 12

Hypertrichosis

Answer 12

Also know as hirsuties; condition of abnormal growth of hair, characterized by the growth of terminal hair in areas of the body that normally grow only vellus hair.

Question 13

Lanugo

Answer 13

The hair on a fetus; soft and downy hair.

Question 14

Laser hair removal

Answer 14

Photoepilation hair reduction treatment in which a laser beam is pulsed on the skin using one wavelength at a time, impairing hair growth; an intense pulse of electromagnetic radiation.

Question 15

Photoepilation

Answer 15

Also known as intense pulsed light; permanent hair removal treatment that uses intense light to destroy the growth cells of the hair follicles.

Question 16

Pilosebaceous unit

Answer 16

The hair unit that contains the hair follicle and appendages: the hair root, bulb, dermal papilla, sebaceous appendage, and arrector pili muscle.

Question 17

Sugaring

Answer 17

Ancient method of hair removal. The original recipe is a mixture of sugar, lemon juice, and water that is heated to form a syrup, molded into a ball, and pressed onto the skin and then quickly stripped away.

Question 18

Telogen

Answer 18

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

Question 19

Threading

Answer 19

Also known as banding; method of hair removal; cotton thread is twisted and rolled along the surface of the skin, entwining hair in the thread and lifting it out of the follicle.

Question 20

Trichology

Answer 20

Scientific study of hair and its diseases and care.

Question 21

Vellus hair

Answer 21

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