BMS100 Past Test Questions
Chapter 6, Fall 2008
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  1. Cells are normally reproducing most rapidly
    1. in the dermis
    2. in the stratum basale of the epidermis
    3. throughout the epidermis
    4. when the skin has been exposed to UVA
    5. when the skin has been exposed to UVB

  2. Mitosis in an epidermal stem cell
    1. produces two stem cells so that we never run out of stem cells
    2. produces two keratinocytes
    3. results in one keratinocyte and one melanocyte
    4. results in one keratinocyte and one cell that remains a stem cell
    5. occurs only if the skin has been scraped or otherwise injured

  3. The majority of the cells in the epidermis contain mainly
    1. sebum
    2. keratin
    3. melanin
    4. collagen

  4. Though embedded in _?_, oil glands and hair follicles are surrounded by a thin layer of _?_ that contains stem cells.
    1. keratin / melanin
    2. dermis / epidermis
    3. epidermis / dermis
    4. dermis / the subcutaneous layer
    5. the subcutaneous layer / dermis

  5. True or false? The epidermis is dependent on the blood vessels of the dermis for oxygen and nutrients.
    1. True
    2. False

  6. Do keratinocytes (the predominant cells of epidermis) contain melanin?
    1. Yes, keratinocytes are able to produce their own melanin to "block out" UV rays.
    2. Yes, keratinocytes take in bits of melanocytes containing melanin.
    3. Yes, keratinocytes take in entire melanocytes which then die within the keratinocyte.
    4. No, keratinocytes do not contain melanin (only melanocytes contain melanin).

  7. Long-term consequences are most likely to occur if an ultraviolet (UV) ray strikes
    1. a keratinocyte that is about to be exfoliated
    2. a melanin granule in the middle layers of the epidermis
    3. a stem cell in the stratum basale of the epidermis
    4. the basement membrane between the dermis and the epidermis