both the amount and darkness of melanin increase upon UV exposure which gives the skin a tanned appearance. melanin reaction helps protects the body against further UV radiation and prevents damage to DNA.
melanin synthesis
Melanin Synthesis
Suntan is 'le bronzage' in French. To get a suntan is 'bronzer'
A single bidirectional transport mechanism appears to be responsible for axonal transport. (From Human Anatomy and Physiology Marieb 8th Ed.)
convection
Volcanic activity.
Suntan lotion is to prevent the tanning from sun. Suntan lotion are used for preventing skin darkening or tanning. You should apply suntan lotion half an hour before going out .
After too much time in the sun, a suntan can become a sunburn. Use sun block if you want to avoid a suntan.
conductions currents
Ultra-violet radiation causes a suntan.
The brain mechanism responsible for this condition lies in the limbic system -- especially in the amygdala.
suntan lotion is bad because it does bad things for your skin.
Because a tattoo is practically engraved and a suntan is like a layer which can come off.