Milady Chapter 11 Trichology

trichology
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trichology
The study of hair is known as____.
hair root and hair shaft
A mature strand of human hair is divided into two principal parts known as the____.
hair follicle
What structure in the skin or scalp encases a hair root?
hair bulb
What is the lowest part of the hair strand?
dermal papilla
What structure is described as a small, cone-shaped elevation located at the bottom of the hair follicle?
arrector pili
What small involuntary muscle is attached to the underside of a hair follicle?
sebaceous glands
Oil glands of the skin, connected to the hair follicles, are known as ___.
nine
Of the 20 amino acids that make up hair, a person must obtain_____ of the essential amino acids from daily diet.
cuticle, cortex, and medulla
The three main layers of the hair shaft are the ___.
melanin
What substance in the cortex gives natural color to the hair?
proteinAs newly formed cells mature, they fill up with a fibrous ____, then move upward, lose their nucleus, and die. This process is called keratinization.51Normal hair contains ____ percent of the element carbon.21Normal hair contains___ percent of the element oxygen.sulfurIn the makeup of normal human hair, what COHNS element is present in the lowest percentage?peptide bondThe chemical bond that joins amino acids to each other is called a ____.saltIn the cortex, a side bond that is easily broken by strong alkaline or acidic solutions is a called a ____ bond.melaninThe cortex contains coloring matter in the form of minute grains of ____, or pigment.red and gingerPheomelanin provides natural hair colors from ____ to yellow and blond tones.wave patternThe shape of a hair strand, described as straight, wavy, curly, or extremely curly, is known as its ____.vellusShort, fine, downy, unpigmented hair is known as its ____.eyelidsWhat place on the body would normally include vellus hair?terminal hairLong, coarse, pigmented hair found on the scalp, legs, arms, and the body is known as ____.anagen (growing), catagen (transitional), and telogen (resting)All hair follicles have the same structure and cycle through the same three phases, which are _____.alopecia areataThe loss of hair in round or irregular patches without inflammation is know as ____,minoxidilWhat treatment has been scientifically proven to increase hair growth and is approved for that purpose by the Food and Drug Administration (FDA)?gray hairCanities is the technical term for ____.gray hairWhat type of hair is caused by the absence of melanin?trichoptilosisThe technical term for split ends is ____.trichorrhexis nodosaThe technical term for hair that is in a dry, brittle condition with nodular swelling along the hair shaft is ____.beaded hairMonilethrix id the technical term for ___.Tinea capitisA scalp condition characterized by red papules or spots at the opening of hair follicles is _____.scabiesWhen a client exhibits signs of ___, salon service should be limited to referring the client to a physician for medical treatment.pediculosis capitisWhat contagious condition is caused by head lice?furuncleWhat is the technical term for a boil - an acute, localized bacterial infection of the hair follicle that produces constant pain?folliculitisWhat term refers to an infection of the hair follicles frequently caused by staphylococcus or other bacteria?thickness or diameterHair texture refers to the ___ of the hair.densityThe number of individual hair strands on one square inch of the scalp indicates hair ____.resistantHair with low porosity is considered ______.elasticityThe strength of the side bonds that hold the hair's individual fibers in place is indicated by hair ____.whorlHair that forms a circular pattern is called a ____.