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What skin tans in response to sunlight because of increased what?
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What vitamin do skin cells produce in response to sunlight?
In white people, and other people with the right gene, Vitamin D. Everybody produces melanin when exposed to the sun. Melanin is the chemical that darkens your skin as a defense against the sun.
What type of reaction is phototoxicity?
phototoxicity, which appears as an increased sensitivity to sunlight or as localized skin rashes on sun-exposed areas.
Why do some people have dark skin?
it is because of the pigment in their skin. it can be hereditary or you can be dark skinned because you spend alot of time in the sunlight (or tanning bed)
Why does sunlight cause your skin to feel warm?
Sunlight causes your skin to feel warm because the sun is very hot. The sun transmits heat and light energy to organisms on Earth.
Can the infrared rays in sunlight cause sunburn.?
Yes and because of the thinning ozone the damage to the skin can result in skin cancer.
How did negros get black?
Black peoples skin is dark because their is an abundance of sunlight in most of Africa and their dark skin prevents too much absorption of vitamin D. White people's skin is light because in most of Europe there is alot less sunlight and the skin is light to help absorb as much vitamin D as possible.
What cell type and cell product protect the skin from UV irradiation?
The cells in the dermis and epidermis called keratinocytes produce melanin in response to UV light in sunlight.
Why are hippopotamuses blue?
Hippopotamuses are blue because when sunlight shines on their fat skin it glows blue!
Why do vampires hide in the shadows?
Because they are creatures of the dark and sunlight burns their skin, and if they stay out too much in sunlight they will die. Unless they have a magical item that protects them.
What is the functional relationship between melanin melanocytes and tanning of the skin?
Melanocytes make the pigment melanin in response to sunlight. The pigment is protective. The pigment in the skin appears as "a tan". More sun = more tan. Sunlight can cause cancer of the skin. A person with a darker skin is more protected. People who live in areas with a lot of sun have adapted to that sun by having darker skin. Of course, when they move to other areas, they pass on the gene for darker skin even if it isn't necessary.
Why are fractures a serious medical condition?
Because there is an increased risk of infrection, damage to the skin and bleeding.
How did the Neandertals adapt physically to their environment?
Their body mass increased and their muscles grew. Their ribcage expanded to allow their lungs to grow. Their skin lightened to help covert sunlight to vitamin D.
