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Unformatted text preview: keratin. The most superficial layers are sloughed. o Keratinization is the transformation of stratum basale cells into stratum corneum cells. o Structural strength results from keratin inside the cells and from desmosomes, which hold the cells together. o Permeability characteristics result from lipids surrounding the cells. Skin Color o Melanocytes produce melanin, which is responsible for different racial skin colors. Melanin production is determined genetically but can be modified by hormones and ultraviolet light (tanning). o Carotene, a plant pigment ingested as a source of vitamin A, can cause the skin to appear yellowish. o Scattering of light by collagen produces a bluish color. o Increased blood flow produces a red skin color, whereas a decreased blood flow causes a pale skin color. Decreased blood oxygen results in the blue color of cyanosis....
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- Fall '10