(Terms) Milady Ch. 11 Properties of the Hair & Scalp | Baamboozle - Baamboozle

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

Whorl

The shape of the hair strands.

Wave pattern

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

Vellus hair

Technical term for knotted hair.

Trichorrhexis nodosa

Technical term for split ends.

Trichoptilosis

Scientific study of hair and its diseases and care.

Trichology

Technical term for ringworm.

Tinea

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

Terminal hair

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

Sebum

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

Scutula

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

Salt bond

Sever case of dandruff characterized by an accumulation of greasy or waxy scales mixed with sebum that stick to the scalp in crusts.

Pityriasis steatoides

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

Pityriasis capitis simplex

Technical term for dandruff; characteerized by excessive production and accumulation of skin cells

Pityrasis

Chemical bond that joins amino acids to each other, end-to-end, to form a polypeptide chain.

Peptide bond

Infestation of the hair and scalp with head lice.

Pediculosis capitis

Technical term for beaded hair.

Monilethrix

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

Medulla

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

Malassezia

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

Keratinization

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

Keratin

A condition of abnormal growth of hair, characterized by the growth of terminal hair in areas of the body that normally grow only vellus hair.

Hypertrichosis/Hirsuties

Easily absorbs moisture (water-loving)

Hydrophilic

A weak, physical, cross-link side bond that is easily broken by water or heat.

Hydrogen bond

Spiral shape of a coiled protein created by polypeptide chains that intertwine with each other.

Helix

Thickness or diameter of the individual hair strand.

Hair texture

The portion of the hair that projects above the epidermis.

Hair shaft

The part of the hair located below the surface of the epidermis.

Hair root

The tube-like depression or pocket in the skin or scalp that contains the hair root.

Hair follicle

The thickened, club-like structure that forms the lower part of the hair root.

Hair bulb

Boil; acute, localized bacterial infection of the hair follicle that produces constant pain.

Furuncle

Technical Term for brittle hair.

Fragilitas crinium

Strong chemical side bonde that joins the sulfur atoms of two neighboring cystein amino acids to create one cysteine, which joins togehter two polypeptide strands like the rungs on a ladder.

Disulfide Bond

A small, cone-shaped elevation located at the base of the hair follicle that fits into the hair bulb.

Dermal papilla

Inflammation of the subcutaneous tissue caused by staphylococci.

Carbuncle

Technical term for gray hair.

Canities

The small, involuntary muscle in the base of the hair follicle.

Arrector pili muscle

Hair loss characterized by miniaturization of terminal hair that is converted to vellus hair.

Androgenic Alopecia

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.

Amino Acids

Autoimmune disorder that causes the affected hair follicles to be mistakenly attacked by a person's own immune system.

Alopecia Areata