Chapter 11 properties of the hair and scalp

The bonds created when disulfide bonds are broken by hydroxide chemical relaxers, after rinsed.

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

The number of individual hair strands on 1 square inch (2.5 square centimeters) of scalp.

Lowest part of the hair strand; the thickest club shaped structure.

Naturally resistant to being penetrated by moisture.

Infestation of the hair and scalp with head lice.

Fungal infection characterized by dry, sulfur-yellow, cuplike crusts on the scalp.

Technical term for dandruff; characterized by excessive production/accumulation of skin cells.

Ability of the hair to stretch and return to its original length without breaking.

Aka hirsuties; abnormal hair growth where terminal hair grows where vellus hair usually grows.

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

Inflammation of the subcutaneous tissue caused by staphylococci; similar to a furuncle.

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

Temporary hair loss experienced towards the end and after the pregnancy.

Technical term for split ends.

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

Complete loss of body hair.

Easily absorbs moisture; in chemistry terms, capable of combining with or attracting water.

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

Variety of canities characterized by alternating bands of gray and pigmented hair.

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

Provides natural dark brown-black color to the hair.

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

Abnormal hair loss.

Thickness or diameter of the individual hair strand.

Outermost layer of hair.

Lighter pigment that provides natural colors ranging from red to yellow.

Naturally occurring fungus that is present on all human skin. causes dandruff when over grows.

Also known as an end bond.

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

Long, coiled complex polypeptides made of amino acids.

Technical term for knotted hair; it is brittle and has nodular swellings along the hair shaft.

Severe case of dandruff characterized by an accumulation of greasy waxy build up on the scalp.

Scientific study of hair and it's diseases and care.

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

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

Ability of the hair to absorb moisture.

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

Tuft of hair that stands straight up.

Innermost layer of the hair that is composed of round cells, often absent in fine hair.

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

Also known as resting phase; the final phase in the hair cycle.

Also known as growth phase; phase during which new hair is produced.

The brief transition period between the growth and resting phases of a hair follicle.

Technical term for brittle hair.

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

Technical term for gray hair.

Hair flowing in the same direction, resulting from follicles sloping in the same direction.

Middle layer of the hair; a fibrous protein core formed by elongated cells containing melanin.

Technical term for beaded hair.

Process by which newly formed cells in the hair bulb, fill with keratin, mature, and die.

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

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

The 5 elements that make up human hair/tissue. (carbon, oxygen, hydrogen, nitrogen and sulfur)

Total loss of scalp hair.

The portion of the hair that projects above the epidermis.

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

An amino acid with a sulfur atom (s) that join together two peptide strands.

A long chain of amino acids linked by peptide bonds.