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51 Cards in this Set

  • Front
  • Back
a small, cone-shaped area located at the base of the hair follicle that fits into the hair bulb is the:
dermal papilla
the substance secreted by the sebaceous glands is called:
sebum
the scientific study of hair, its diseases, and its care is known as:
trichology
the part of the human hair that projects above the skin is known as the:
hair shaft
the pocket or tubelike depression in the scalp or skin that contains the hair root is the:
follicle
the thickened, clublike structure that forms the lower part of the hair root is the:
hair bulb
the tiny, involuntary muscle fiber in the skin inserted in the base of the hair follicle is the:
arrector pili
the three main layers of the hair shaft are the cuticle, cortex and the:
medulla
the layer that constists of transparent, scalelike cells that look like shingles on a roof is:
the cuticle
the fibrous protein core formed by elongated cells that contains melanin pigment is the:
cortex
a lengthwise section of hair shows that cuticle scales overlap and each individual cuticle scale is attached to the:
cortex
the cortex is responsible for the natural color of hair, 90% of the total weight, and hair:
elasticity
the medulla, the innermost layer of the hair, is composed of cells that are:
round
hair is composed of protein that grows from cells originating within the:
hair follicle
the hair shaft that emerges from the scalp is a nonliving fiber composed of:
keratinized protein
the units of structure that build protein and are linked end-to-end like a string of pearls are:
amino acids
chemical bonds that hold together amino acid molecules are:
peptide bonds
when peptide bonds hold together very long chains of amino acids, it is called:
polypeptide chain
the three different types of cross-links that form bonds between the polypeptide chains in the cortex are:
hydrogen, salt and disulfide bonds
the five major elements found in skin, hair, and nails are often referred to as the:
COHNS elements
COHNS elements
Carbon 51%
Oxygen 21%
hydrogen 6%
nitrogen 17%
sulfur 5%
a weak, temporary side bond that is easily broken by water and heat is a:
hydrogen bond
a temporary side bond between adjacent polypeptide chains that is broken by changes in pH is a:
salt bond
permanent waving and hair relaxers change the shap of hair by chemically altering the hair's:
disulfide bonds
hydroxide chemical relaxers break disulfide bonds and convert then to:
lanthionine bonds
all natural hair color is the result of pigment located in the cortex called:
melanin
the melanin that provides brown or black color to hair is:
eumelanin
the term that is used to describe the shape of the hair strand is the:
wave pattern
the thickness or diameter of the individual hair strand is referred to as hair:
texture
hair that has the largest diameter and usually requires more processing time is:
coarse hair texture
the measurement that describes the number of individual hair strands on one square inch of the scalp is:
density
the ability of the hair to absorb water or oil is:
porosity
the ability of hair to stretch and return to its original length without breaking is referred to as hair:
elasticity
hair flowing in the same direction, the result of follicles sloping in the same direction form a:
hair stream
dry hair and scalp should be treated with products that contain moisturizers and:
emollients
oily hair and scalp are caused by improper washing or overactive:
sebaceous glands
the short, fine and downy hair that helps in the efficient evaporation of perspiration is:
vellus hair
the three growth cycles of human hair are:
anagen, catagen, telogen
the average growth of healthy scalp hair is about:
1" per month
the sudden falling out of hair in round patches or baldness in spots is:
alopecia areata
the technical term for gray hair is:
canities
the condition of abnormal hair growth is referred to as:
hypertichosis
a condition that is characterized by brittleness and the formation of nodular swellings along the hair shaft is:
trichorrhexis nodosa
the medical term that is used to describe dandruff is:
pityriasis
current research confims that dandruff is the result of a fungus called:
malassezia
a severe type of dandruff characterized by an accumulation of greasy or waxy scalp scales mixed with sebum is:
pityriasis steatoides
an infestation of the hair and scalp with head lice is :
pediculosis capitis
an acute, localized bacterial infection of the hair follicle that produces constant pain is a:
furuncle (boil)
a highly contagious skin disease caused by a parasite called a mite is:
scabies
a carbuncle is an inflammation of the subcutaneous tissue caused by:
staphylococci
a client with seborrheic dermatitis should be referred to:
a physician