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Chapter 11
Properties of Hair
| Question | Answer |
|---|---|
| The Greek words trichos means “hair.” | True |
| The body produces the 20 amino acids that make up hair. | False |
| The sebaceous glands contain the blood and nerve supply that provides the nutrients needed for hair growth. | False |
| The hair cuticle consists of an overlapping layer of transparent, scale-like cells that look like shingles on a roof. | True |
| Hair is approximately 60 percent protein. | False |
| A peptide bond is reformed by drying or cooling. | False |
| Eumelanin provides natural colors ranging from red and ginger to yellow and blond tones. | False |
| Vellus hair is not pigmented and almost never has a medulla. | True |
| The complete loss of all body hair is known as alopecia totalis. | False |
| You should not perform a service on a client who has seborrheic dermatitis. | True |
| The hair, skin, nails, and glands are known collectively as the: | integument |
| The five main structures of the hair root include all of the following except the: | epidermis |
| The pocket or tube-like depression in the scalp or skin that contains the hair root is the: | follicle |
| The thickened, club-like structure that forms the lower part of the hair root is the: | Hair Bulb |
| A small, cone-shaped area located at the base of the hair follicle that fits into the hair bulb is the: | dermal papilla |
| Which layer of the hair shaft creates the shine and the smooth, silky feel of healthy hair? | cuticle |
| A lengthwise section of hair shows that cuticle scales overlap and each individual cuticle scale is attached to the: | Cortex |
| The fibrous protein core formed by elongated cells that contains melanin pigment is the: | Cortex |
| 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 major elements that make up human hair are carbon, oxygen, hydrogen, nitrogen, and sulfur, often referred to as the: | COHNS elements |
| The units of structure that build protein and are joined together end to end like pop beads are: | amino acids |
| A long chain of amino acids linked by peptide bonds is called a: | polypeptide chain |
| The three different types of side bonds are: | hydrogen, salt, and disulfide |
| A physical side bond that is easily broken by water and heat is a: | hydrogen bond |
| A weak, physical, cross-link side bond between adjacent polypeptide chains that is broken by changes in pH is a: | salt bond |
| Permanent waving and hair relaxers change the shape of hair by chemically altering the hair’s: | disulfide bonds |
| Hydroxide chemical relaxers break disulfide bonds and convert them 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 |
| Which of the following terms is used to describe hair’s wave pattern? a. curly c. extremely curly b. straight d. All answers are correct. | All answers are correct. |
| Vellus hair is the is short, fine, and downy hair also known as: | lanugo hair |
| The three growth cycles of human hair are: | anagen, catagen, and telogen |
| The resting phase or final phase of the hair cycle that lasts until the fully grown hair is shed is the: | telogen phase |
| 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 of terminal hair is referred to as: | hypertrichosis |
| Trichoptilosis is the technical term for: | split ends |
| A condition that is characterized by brittleness and the formation of nodular swellings along the hair shaft is: | trichorrhexis nodosa |
| Dry hair and scalp should be treated with products that contain moisturizers and: | emollients |
| Refers to the shape of the hair strand | Wave pattern |
| Long, coiled, complex polypeptides made of amino acids | Proteins |
| The technical term for brittle hair | Fragilitas crinium |
| Temporary hair loss experienced at the end of a pregnancy | Postpartum alopecia |
| The outermost layer of hair | Cuticle |
Created by:
mztina216