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