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  1. Nov 01, 2014 · The hair shaft, or hair fiber, comprises 3 layers: the cuticle, the cortex, and the medulla.2, 15 Chemically, the shaft consists of proteins, lipids, water, melanin, and trace elements. 16 A hair shaft can tell us about a person's hair care history, 17 and may feature signs of weathering, from the root to the tip. 15 The tip of the hair shaft, as the oldest part, exhibits the most cosmetic damage, whereas the root is probably less porous and has different chemical properties that affect its ...

    • A. Guerra-Tapia, E. Gonzalez-Guerra
    • 2014
  2. Cells responsible for producing the pigment for dark hair are located in which of following? a. The cortex of the hair shaft b. Throughout the hair shaft c. The internal root sheath of the hair d. The dermal papilla of the hair bulb e. The hair...

  3. A network of small hairs that anchor the larger hair to the skin A network of small muscles that contract, giving you goosebumps A network of sensory nerves attached to the arrector pili A networks...

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  5. Most often when hair evidence is presented in a criminal case the primary purpose is to establish the identity of the individual when no other means is aviable False The ultimate value of fibers as forensic evidence depends on the ability to narrow their origin to a limited number of sources or even to a single source.

  6. Differentiate between the hair papilla, the hair root, and the hair shaft.. Hair growth begins from hair papilla (a small cap-shaped cluster of cells located in the larger hair bulb at the base of the follicle) The hair root lies hidden in the follicle (and the ) shaft is the visible part of the hair.

  7. The portion of hair hidden in the follicle. Hair shaft visible part of the hair and extends from the follicle. Bulboid (Krause end bulbs) The receptors in the skin that respond to low-frequency vibration. Tactile (Meissner)corpuscles Sensory receptors that are stimulated by light touch. Lamellar (Pacini) corpuscles

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