2006-09-12 02:43:46 · 5 answers · asked by unquenchablethirst 2 in Science & Mathematics ➔ Physics
Sunlight contains UV (ultraviolet) rays. This is a form of radiation. When your skin is exposed to this low-level radiation, it causes breakdown of the proteins and other chemicals in your skin's cells. Your immune system reacts by further degrading these breakdown products, which in turn releases harmful oxygen-related molecules (this is called oxidative damage). This can cause irreversible damage to DNA. Most of the time, the cell dies and is replaced by a new healthy cell. But there is always the risk that the DNA is damaged in such a way that instead of causing cell death, it will result in uncontrolled cell proliferation. This is what all types of cancer are due to - uncontrolled cell growth.
2006-09-12 02:58:01 · answer #1 · answered by roobs 2 · 0⤊ 0⤋
The sun is a continuous hydrogen bomb, controlled by the massive gravity of the sun. When you sunbath, you are being irradiated with thermonuclear radiation, including powerful ultraviolet rays. These penetrate your skin and cause certain atoms to ionize. In turn, this causes cell death and mutation.
If you must be out in the sun, dress properly and wear a hat and sunglasses to protect your eyes. If you absolutely must sunbath, use the best sunscreen you can buy.
2006-09-12 02:52:05 · answer #2 · answered by pvreditor 7 · 0⤊ 0⤋
I am 76 now and I have some groaths on my back from sunburn's that I got about 60 yrs ago. Be careful the ones I have are only the per cancer none are the bad ones.
2006-09-12 02:49:16 · answer #3 · answered by JOHNNIE B 7 · 0⤊ 1⤋
The solar is maximum useful between 10am and 2pm, so in case you're taking your walk outdoors of those hours, you would be nice. quarter-hour isn't very long, in reality it relatively is healthy on your epidermis to get some solar (it enables your physique to synthesize diet D). while you're nevertheless extremely frightened, positioned on a great-brimmed hat, colorings and long sleeves, and positioned sunscreen on any uncovered epidermis. The well-being advantages of daily strolling would outweigh the prospect of increasing the prospect of epidermis maximum cancers - what I mean is, in case you reside inactive, you're extra probably to get different well-being problems than you're to get epidermis maximum cancers from quarter-hour exposure according to day. have exciting strolling!! xx
2016-09-30 21:06:40 · answer #4 · answered by Anonymous · 0⤊ 0⤋
There are two types of rays that can be very harmful to the skin; they are UV-A and UV-B. Sunscreen can help protect against some of these but not all. That is the reason.
2006-09-12 02:46:05 · answer #5 · answered by Anonymous · 0⤊ 1⤋