How is the presence of melanin helpful to skin cells?
A) It blocks UV radiation from damaging DNA of skin cells.
B) It acts as a waterproofing material, allowing the skin to be dry and waterproof.
C) It is able to attack and destroy germs (pathogens) before they enter the body through the skin.
D) It provides a source of fuel (carbohydrates) to the epidermal cells.
E) It is the source of new skin cells, helping in the repair of wounds.
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Q22: Production of _ and the darkening of
Q23: What makes up the structure of a
Q24: What is a normal response to excess
Q25: What are dermal papillae?
A) Conical projections of
Q26: The _ layer lacks blood vessels.
A) epidermal
B)
Q28: Which statement describes merocrine (eccrine) sweat glands?
A)
Q29: The fingernails and toenails consist of what
Q30: Skin cells play an important role in
Q31: What is keratinization?
A) Process of hardening the
Q32: Collagen and elastic fibers of the _
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