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Home Q & A Board Biology-Related Homework Help Medicine Nursing and Clinical
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kemkem9 kemkem9
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6 years ago
Which of the following statements best conveys an aspect of the process of keratinization?
 
  A)
  Keratin cells synthesized in the dermis migrate to the surface over 20 to 30 days.
  B)
  Mitosis that begins with the cells of the stratum granulosum results in a continual supply of new keratinocytes.
  C)
  The stratum germinativum continuously produces new keratinocytes to replace losses.
  D)
  The basal cells of the epidermis migrate to the skin surface at a rate that matches superficial losses of skin cells.
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wrote...
#1
6 years ago
Ans:
C

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The stratum germinativum, or stratum basale, consists of a single layer of basal cells that are attached to the basal lamina. The basal cells, which are columnar, undergo mitosis to produce new keratinocytes that move toward the skin surface to replace cells lost during normal skin shedding. Keratinization does not originate in the dermis or stratum granulosum, and the basal cells of the epidermis do not migrate to the surface.
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