Ultraviolet rays of the sun stimulate production of ____ in the skin.
A)keratin
B)collagen
C)melanin
D)all of these

Name: Ultraviolet rays of the sun stimulate production of ____ in the skin. A)keratin B)collagen C)melanin D)all of these
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Ultraviolet rays stimulate the production of melanin in the skin, which is responsible for skin pigmentation and protection against further damage from the sun. Keratin and collagen are also important components of skin, but are not directly stimulated by UV rays.

Ultraviolet Rays of the Sun Stimulate Production of ____ in the Skin