The Stratum Basale

Question

The stratum basale
A) contains cells that undergo meiosis to form new epidermal cells.
B) has a mixture of living and dead cells - mostly dead.
C) is easily shed when you rub your hands together.
D) contains many blood vessels that nourish the epidermis.
E) contains cells that undergo mitosis to form new epidermal cells.

Accepted Answer

The stratum basale is the deepest layer of the epidermis and contains actively dividing cells called keratinocytes, which undergo mitosis to produce new epidermal cells. Option A is incorrect because there is no meiosis occurring in the stratum basale. Option B is incorrect because the stratum basale is primarily made up of living cells. Option C is incorrect because the stratum basale does not shed easily. Option D is incorrect because while the dermis contains blood vessels to nourish the skin, the stratum basale does not have a direct blood supply.