Chapter 11 Vocab Test 1

Front 1

Keratinization

Back 1

Process by which newly formed cells in the hair bulb mature, fill with keratin, move upward, lose their nucleus, and die.

Front 2

Peptide Bond

Back 2

Also known as an end bond; chemical bond that joins amino acids to each other, end-to-end, to form a polypeptide chain.

Front 3

Malassezia

Back 3

Naturally occurring fungus that is present on all human skin, but is responsible for dandruff when it grows out of control.

Front 4

Keratin

Back 4

A fibrous protein that grows from cells originating within the hair follicle.

Front 5

Pediculosis Capitis

Back 5

Infestation of the hair and scalp with head lice.

Front 6

Pheomelanin

Back 6

The lighter pigment that provides natural colors ranging from red and ginger to yellow and blond tones.

Front 7

Whorl

Back 7

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

Front 8

Trichology

Back 8

Scientific study of hair and its diseases and care.

Front 9

Pityriasis Capitis Simplex

Back 9

Technical term for classic dandruff; characterized by scalp irritation, large flakes, and itchy scalp.

Front 10

Proteins

Back 10

Long, coiled complex polypeptides made of amino acids.

Front 11

Sebaceous glands

Back 11

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

Front 12

Side Bonds

Back 12

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

Front 13

Tinea

Back 13

Technical term for ringworm- a contagious condition caused by fungal infection and not a parasite; characterized by itching, scales, and, sometimes, painful lesions.

Front 14

Trichoptilosis

Back 14

Technical term for split ends.

Front 15

Wave Pattern

Back 15

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

Front 16

Telogen

Back 16

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

Front 17

Medulla

Back 17

Innermost layer of the hair that is composed of round cells; often absent in fine and naturally blond hair.

Front 18

Melanin

Back 18

The tiny grains of pigment in the cortex that give natural color to the hair.

Front 19

Salt Bond

Back 19

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

Front 20

Tinea Favosa

Back 20

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