Chapter 8: Hairs, Fibers, and Paints
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15 terms
Terms | Definitions |
|---|---|
 Anagen Phase | The initial growth phase during which the hair follicle actively produces hair. |
| Catagen Phase | A transition stage between the anagen and telogen phases of hair growth |
| Cortex | The main body of the hair shaft. |
| Cuticle | The scale structure covering the exterior of the hair. |
| Follicular Tag | A translucent piece of tissue surrounding the hair's shaft near the root. It contains the richest source of DNA associated with hair. |
| Macromolecule | A molecule with a high molecule mass. |
| Manufactured Fibers | Fibers derived from either natrual or synthetic polymers; the fibers are typically made by forcing the polymeric material through the holes of a spinneret. |
| Medulla | A cellular column running through the center of the hair. |
| Mitochondrial DNA | DNA present in small structures (mitochondria) outside the nucleus of a cell. Mitochondria supply energy to the cell. This form of DNA is inherited maternally (from the mother). |
| Molecule | Two or more atoms held together by chemical bonds. |
| Monomer | The basic unit of structure from which a polymer is constructed. |
| Natural Fibers | Fibers derived entirely from animal or plant sources. |
| Nuclear DNA | DNA present within the nucleus of a cell. This form of DNA is inherited from both parents. |
| Polymer | A substance composed of a large number of atoms. These atoms are usually arranged in repeating units or monomers. |
| Telogen Phase | The final growth phase in which hair natrually falls out of the skin. |
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