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chapter 11
| Term | Definition |
|---|---|
| the scientific study of 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 in the | soles of feet |
| the ? is a tiny, involuntary muscle in the base of the hair follicle | tinea |
| an oily substance secreted from the sebaceous gland 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 makeup the chemical composition of human hair are carbon, oxygen, hydrogen, and | nitrogen and sulfur |
| The strong, chemical bonds that join amino acids are called: | peptide bonds |
| Which type of melanin provides natural colors ranging from red and ginger to yellow and blond tones? | pheomelanin |
| asians tend to have | extremely straight hair |
| To help minimize tangles in extremely curly hair when shampooing, you should use: | a detangling rinse |
| Hair texture is classified as: | course, medium, or fine |
| The measurement of the number of individual hair strands on one square inch (2.5 square centimeters) 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 elasticity will stretch up to ________ of its original length and return to that length without breaking | 50% |
| Oily hair and scalp can be treated by properly washing with a: | normalizing shampoo |
| Which type of hair almost never has a medulla? | vellus |
| the growth phase during which new hair is produced is | anagen |
| The average growth of healthy scalp hair is: | 1/2 inch (1.25 centimeters) per month |
| The technical term used to describe gray hair is | canities |
| a condition of abnormal growth of terminal hair in areas of the body that normally grow only vellus hair. | hypertrichosis |
| Technical 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 manifest | at or before birth |
| Dandruff can easily be mistaken for: | dry scalp |
| Current research confirms that dandruff is a result of a | fungus |
| the most frequently encountered fungal infection resulting from hair services is | tinea barbae |
| Tinea is characterized by _____, scales, and sometimes, painful circular lesions | 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 |
Created by:
mckenzied