Properties of the Hair and Scalp
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| The scientific study of the hair, its diseases, and its care is called? | Trichology
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| The two main divisions of the hair are the hair root and the? | Hair Shaft
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| The hair root is contained in a tube-like depression, or pocket, in the skin known as the: | Follicle
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| The club-shaped structure that forms the lower part of the hair root is the: | Hair blulb
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| The three layers of the hair shaft are the cuticle, cortex, and: | Medulla
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| The layer of the hair shaft that protects it from penetration and damage is the: | cuticle
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| In order to penetrate the cutucle layer and reach the cortex, oxidation haircolors, perm solutions, and chemical relaxers must have: | An alkaline pH
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| As living cells of the hair mature, they fill up with a protein called? | Keratin
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| The elements that make up the amino acids in hair are? (there are five) | Carbon, Nitrogen, Hydrogen, Oxygen, Sulfer
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| Of the five elements in the human hair, the element that makes up the highest percentage is: | Carbon
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| Dislufide bonds can be broken by? | Perms and relaxers
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| A hydrogen bond is a physical side bond that is easily broken by? | water or heat
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| A cross-section of a wavy hair strand is referred to as its _________ | Wave pattern
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| Hair texture is defined as the hairs's: | Diameter
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| The hair texture that is most susceptible to damage from chemical services is? | Fine
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| The thickest hair (highest density) is generally found among people with? | Blonde hair
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| Hair with high porosity is generally the result of? | overprocessing
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| Wet hair with normal elasticity will stretch up to____% of its original lenth and return to that same length without breaking | 50
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| Dry hair and scalp are caused by? | Inactive sebaceous glands
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| The three phases of hair growth are anagen, catagen, and _______ | Telogen
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| The growth phase of the hair growth cycle is known as? | Anagen
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| About ______% of scalp hair is growing in the anogen phase at any one time | 90
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| Gray hair is exactly the same as pigmented hair except that it lacks ______ | Melanin
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| The technical term for split ends is | Trichoptilosis
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| Pediculosis Capitis is the infestation of the hair and scalp with? | Head lice
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| Preventing the spread of tinea,pityrasis, and staphylococci infections involves proper? | Sanitation and disinfection
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Created by:
Cosmo Nelly