The outer layer of the epidermis, called the stratum corneum, provides the most effective barrier to prevent penetration of the skin by environmental factors
The nurse working in an emergency department is aware that an example of a penetration by an environmental factor is caused by what?
A) Insect bites
B) Dehydration
C) Thermoregulation
D) Perspiration
Ans: A
Feedback: The stratum corneum, the outer layer of the epidermis, provides the most effective barrier to both epidermal water loss and penetration of environmental factors, such as chemicals, microbes, insect bites, and other trauma. Dehydration, thermoregulation, and perspiration are not examples of penetration of an environmental factor.
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