| A | B |
|---|
| The scientific study of the hair, its diseases, and care is called | trichology |
| The two parts of a mature strand of human hair are the | hair shaft and hair |
| The tube-like depression or pocket in the skin or scalp that contains the hair root is the | follicle |
| Hair follicles are NOT found on the | soles of the feet |
| The _______ is a tiny, involuntary muscle in the base of the hair follicle | arrector pili |
| An oily substance secreted from the sebaceous glands is | sebum |
| For chemicals to penetrate a healthy cuticle hair layer, they must have | an alkaline pH |
| The medulla is composed of _______ cells. | round |
| The process whereby living cells mature and begin their journey up the hair shaft is | keratinization |
| The five main elements that make up the chemical composition of human hair are carbon, oxygen, hydrogen, and | nitrogen and sulfur |
| The chemical bonds that hold together the amino acid molecules are called | peptide bonds |
| Which type of melanin provides natural colors ranging from red and ginger to yellow and bond tones | pheomelanin |
| Asians tend to have | extremely straight hair |
| To help minimize tangles in extremely curly hair when washing, you should use | a detangling rinse |
| Hair texture is classified as | coarse, medium, or fine |
| The measurement of individual hair strands on 1 square inch of the scalp is | hair density |
| Compared to hair with high porosity, chemical services performed on hair with low porosity require | more alkaline solutions |
| Wet hair with normal eleasticity will stretch up to ____ of its original length | 50 percent |
| Oily scalp and hair can be treated by properly washing it | with normalizing shampoo |
| Which type of hair almost never has a medulla | vellus |
| The growth phrase during which new hair is produced is | anagen |
| The average growth of healthy scalp hair is | 1 inch per month |
| The technical term used to describe gray hair is | canities |
| A condition of abnormal hair growth on areas of the body is | hypertrichosis |
| The medical term for dandruff is | pityriasis |
| The body can produce 11 of the 20 ____ that make up hair. | amino acids |
| Salt bonds account for about ______ of the hair's overall strength. | one-third |
| The anagen phase generally lasts from three to five | years |
| Scalp hair grows _____ on women than on men. | faster |
| The _____ phase signals the end of the growth phase. | catagen |
| Scalp massage ____ hair growth. | does not affect |
| Compared to pigmented hair, gray hair is: | neither coarser nor more resistant |
| Cross-sections of hair | can be almost any shape |
| Bald men are commonly perceived as | less successful |
| By age 35, almost ______ percent of both men and women show some degree of hair loss | 40 |
| Finasteride is an oral prescription medication for hair loss that is meant for | men only |
| Congenital canities manifests | at or before birth |
| Dandruff can easily be mistaken for | dry scalp |
| Dandruff is believed to be caused by a | fungus |
| The most frequently encountered fungal infection resulting from hair services is | tinea barbae |
| Tinea is characterized by | itching |
| The infestation of the hair and scalp with head lice is called | pediculosis capitis |
| A carbuncle is similar to a furuncle, but is | larger |
| Fine hair is ______ than coarse or medium hair, | more fragile |
| Coarse hair | is stronger than fine hair |
| The ____ is the outermost layer of hair. | hair cuticle |
| The oil glands in the skin that are connected to the hair follicles are the ______ glands. | sebaceous |
| A ____ bond is a physical bond easily broken by water or heat. | hydrogen |
| Hair is approximately _____ percent protein. | 90 |
| Total scalp hair loss is known as | alopecia totalis |
| Hypertrichosis is alson known as | hirsuties |
| The naturally occurring fungus that causes the symptoms of dandruff when it grows out of control is | malassezia |
| The ______ is the lowest part of a hair strand. | hair bulb |
| The technical term for beaded hair is | monilethrix |
| A highly contagious skin disease caused by a parasite called a mite that burrows under the skin is | scabies |
| The term for the spiral shape of a coiled protein is | helix |
| Shaving, clipping, and cutting the hair on the head | has no effect on hair growth |
| Dry, sulfur-yellow, cup-like crusts on the scalp are called | scutula |
| The _____ are part of the integumentary system. | hair, skin,nails, and glands |
| The long, coarse, pigmented hair found on the scalp, legs, arms, and bodies of males and females is called ______. | terminal hair |
| The technical term for knotted hair is | trichorrhexis nodosa |
| The ______ is the innermost layer of the hair. | medulla |
| Hair that forms in a circular pattern on the crown of the head is called | whorl |
| The part of the hair located below the surface of the epidermis is the | hair root |
| A tuft of hair that stands straight up is a | cowlick |
| The ability of the hair to absorb moisture is called | hair porosity |
| The middle layer of the hair is the | cortex |
| An autoimmune disorder that causes affected hair follicles to be mistakenly attacked by a person's own immune system is | alopecia areata |
| Vellus hair is also known as | lanugo hair |
| The medical term for ringworm is | tinea |
