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Properties of the Hair and Scalp

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Question
Answer
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