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Milady chap 11
| Question | Answer |
|---|---|
| Integgumenteray system | Component of the hair,skin,nail,and glands are |
| Amature standard of human hair is diveded in to | Two parts the hair root and the hair shaft |
| Is the part of hair located below the surface of epidermis(outer layer of the skin) | Hair root |
| Is the portion of the hair that projectss above the epidermis | Hair shaft |
| How many stracture has Hair Root? Name them | 5 Hair folicle Hair bulb Dermal papile Arrector pili muscle Sebaceous (oily) glands |
| Is the tube-like depression or poket in the skin or scalp that contains the hair root | Hair follicle |
| Is the lowest part of hair strand.its thickend, | Hair bulb |
| Small con shaped eleviation located at the base of the hair follicke that fits in to hair bulb, | Dermal papilla |
| ______ is mother of hair b/c of it contains blood,and nerv supply that provide the nutirations needed for hair growth | Dermal papilla |
| Is small involuntary muscle in the base of hair follicle. | Arrector pili muscle |
| goose bumps | Strong emotions or cold ssnsetions caused it to contract wich makes the hair stand up straight n results |
| Oily glands in skin connected to follicles | Sebaceous glands |
| He sebaceous glands secrete fatty or an oily substance called | sebum |
| Three main layers of hair shaft | Hair cuticle The Cortex The medula |
| Hair cuticle | The outer most layer of the hair.it consists of single overlapin layer transparent,scale-like cells that look like shingles on a roof |
| ______layer provides a barrier that protects the inner structure of the hair as it lies tightly against the cortex | The cuticle layer |
| ___ is responsible for creating shine and the smooth silky feel of healty hair | Hair cuticle |
| A healthy hair cuticle layer protects the hair from | Penetration n prevents damage to hair fiberss. Oxidation haircolors,permanent waving solutions,n chemichal hair relaxer |
| To penetrate cuticle layer | Relaxer must have an alkaline pH to penetrate the cuticle layer b/c a high pH swell the cuticle and causes it to lift and expose the cortex |
| ____ the middle layer of the hair.its fibrous protin core formed by enlongated cells containing melanin pigment. | The Cortex |
| Abt 90% of total weight of the hair comes from | cortex |
| The elasticity of hair n natural color r the resalts of | Unique protein stracture located with in cortex |
| The changes involved oxidation haircoloring,wet setting,thermal styling,permanent waving n chemical hair relaxing tacks place | With in cortex |
| The Medulla is | Innermost layer of the hair n is composed of round celles |
| Only thick coars hair contains | Medulla |
| Hair is composed of ______ that grows from cells originating wittin the hair follicle | Protin |
| The hair beiging at...... | Follicle |
| Keratinization is | Process of the living cells form begin their jorney upward throgh the hair follicle |
| The newly formed cells mature,they fill up with fibrous protin called | keratin |
| The hair shaft that emerges is nonliving fiber composed of..... | Keratinized protien |
| Hair is approxmatly ...... % of protin | 90% |
| The protine is made up of long chains of..... | amino acids |
| The major elemnts that make up human hair are.... often referd as COHNS element | Carbon Oxygen Hydrogen Nitrogen Sulfur |
| %age of elements | Carbon 51% Oxygen 21% Hydrogen 6% Nitrogen 17% Sulfer 5% |
| The strong chemical bond that joins amino acids is | Peptide bond(end bond) |
| A long chain of amino acids linked by peptide bond is called | Polypeptide chain |
| The spiral shape of coild protein is called | Helix |
| Helix creates......? | When the polypeptides chains interwine with each other |
| The cortex is made up of...... | Millions of popypeptide chains |
| polypeptide chains r crossed-linked like the runngs on ladder by 3 d/f types of...... | Side bonds |
| Polypeptide chains together r responsible for the..... | Extreme strength n elastisity of human hair,and essential to wet setting,thermal styling,permanet waving n chemical hair relaxing |
| The 3 types of side bonds r | Hydrogen bond Salt Disulfied bonds |
| A hydrogen bond is | A weak,physical cross-link side bondesthat easly broken by WATER OR HEAT |
| A salt bond is | weak,physical cross-link side bond b/nadjecent polypeptide chains,depend on pH Broken by strong Alkaline or acidic solutions |
| A disulfide bond ....... | is a strong, chemical not physical side bond that is very d/f from the physical sidd bond of hydrogen or salt bond |
| The disulfied bond joins the sulfer atoms of two nehboring .... | Cysteine |
| The cystine joins together two..... | polypeptid strands |
| Disulfide bonds r | Not broken by water but by permanent waves and chemical hair relaxers that alter the shape of hair |
Created by:
Yoni101