"What is the role of ACTH and melanin when the skin is exposed to ultraviolet light?"
It secretes a pigment called melanin.
Skin cells do not produce a hat - no matter what kind of radiation falls on them.
Melanin
Pigment that protects from the ultraviolet light is called melanin. This is science.
No. They can not see in ultraviolet light. They are known to glow when exposed to ultraviolet light, though.
Vitamin D production begins when a precursor molecule is exposed to ultraviolet light in the skin.
ultraviolet light
Originally, everyone had brown eyes, which are caused by melanin in the eye. The melanin protects the eyes from the damaging effects of ultraviolet light.
The variations of skin color are a result of the amount of melanin that is produced and how it is distributed. this is obvious when you are exposed to the ultraviolet rays of the sun. In order to protect your skin, melanocytes produce more melanin and, voila!, you've got a tan.
Skin
Ultraviolet Light
Yes!!! The melanin in keratinocytes protects your epidermis and dermis from harmful effects of sun light. Thus, more melanin is produced.