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The Science of Tanning

There's a lot of controversy surrounding tanning. Some people say a little sun is good for you (it's a source of vitamin D, you know), while others say you should stay in the shade to avoid skin cancer. But how many people really know what's going on in your skin to make you turn brown? Get the good on tanning here!

What is a Tan?

Melanocytes are special skin cells that produce melanin (skin pigment) when they are exposed to ultraviolet light in sunlight. The pigment absorbs UV radiation in sunlight, so it helps to protect skin cells from UV damage. Your body actually produces two kinds of pigmant. One is called eumelanin and it is responsible for the golden brown color we normally associate with tanning. Another pigment is called phaeomelanin and it produces a red color. Redheads and blondes produce more phaeomelanin and less eumelanin, which is why they don't tan as well.

How Does Your Body Know It's Sunny Out?

Sunlight (or UV light from tanning beds) affects the pituitary gland (a gland at the base of the brain that secretes hormones) which then produces MSH (melanocyte-stimulating hormone). This hormone flows through the bloodstream to the melanocytes, which makes them able to produce more melanin. Since the pituitary gland is tied into the optic nerve, (the nerve in your eyes that lets you sense light), wearing sunglasses makes you tan less. Weird.

Tanning and Race

Different races tan differently (and some don't tan at all). Caucasians (white people) and other lighter skinned races tan the way explained above. People of darker races produce melanin continuously (without having to go in the sun), which means their skin is always pigmented (dark) to varying degrees. People of dark races are much less likely to get skin cancer because their cells are constantly protecting them from UV radiation.

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Delancey
Delancey posted in New Users:
If you're new at Kidzworld, then I hope this thread will help you. Here's some simple rules of using your profile! Look below. Changing Profile Picture- To upload a profile picture, first go to your profile. It'll show a pink default picture if you're a girl and a blue default picture if you're a boy. By the way, Click on the pink or blue picture. The picture will show a bit large, Look below of the picture. A option called ''Upload photo'' , Click on that and then click on ''Choose File'' option and select the picture you want to make your profile picture. First it'll go on moderation. Then mods will delete it or approve it. Make sure that the picture is appropriate. No Nudity and KW will reject your picture if the picture have any link. Mood- Look below your username , an option called ''Mood''. Moods are fun, there's few moods and you've to choose one of them and click on ''Save'' option when you're done!  Status- In a status what you're doing, or a quote or anything you can give. But don't give out #### ###### , E-mails or any other website Id. It is important for you to realize your online friends should not be able to contact you in any way except through your profile on Kidzworld. To post a status , look below your medals and see an option called '' Edit'' and ''Clear''. Click on Clear to post a Status!  Bio- Bio means just give a bit introduction of yourself.  Let other kids know what you're all about. But no swearing. No matter how much you trust them, it can be dangerous. :) To post bio, look below your medals an option called '' Edit Bio'' , click on it and write bio. Comments- You can talk to your friends on comments. Every members get medals for sending and receiving  comments. But same as others; No swearing. To send a comment, go to the profile of the friend you want to send a comment and scroll down. Then saw a widget called ''Comments'' and type your message to the friend and hit on ''Send comment'' below.  Blogs- Blogs are fun! You can share anything on blogs. Like about your favorite seasons or your day at Kidzworld. Every blogs don't go on moderation. Few blogs go , if you're posting a word which isn't allowed on KW then it'll go on moderation , mods will check it then approve it or delete it. So it'll be better if you don't post any bad words. To post a blog, go to your profile and click on '' Write a blog about your life or your favorite subject'' option or you can see the option called ''Create a blog'' Then give your blog a title and type the message and click on save changes.    Albums- There's few ways to create a photo album. First to go your profile and click on your profile picture. Look below of your profile pictures , there's two options. First, Back to profile and Second , See all albums. Click on see all albums option. Look beside your profile picture , an default album starting with your username. Click on that. Then click on Upload a photo option and upload your pic. Widgets- Widgets are the boxes on your profile that contain different fun features. For example, the comments box is a widget; the photos box is a widget. How do I add or delete my widgets?   Click on the "Add Widgets" button on the right side of your profile page. There are many widgets to choose from. Once you have selected a widget, click the picture to add it. You can also remove some of the widgets from your profile by clicking on the "X" in the upper right corner. All "widgets" are movable by grabbing them with your mouse and dragging them to where you want them to be. They can be wide or narrow – your choice. To drag the widgets, go to the top of the widget; your mouse will automatically become four arrows, allowing you to drag the widget. KW Medal- There are a KW medal which will show that from how many days you joined KW! If you don't want to show that medal , go to your settings [click the last button in the top right] and look there's your information like your gender age etc. Keep reading your information ---and look below an option called KW medal : On/Off. Click on Off if you don't want to show the medal on your profile. Videos- To add videos , First of all you need to activate your video widget. Then click on Add Video option. Copy the URL of the video from YouTube and paste the URL into to the white box. And don't forgot to give your video a title. This is a fun place for kids to come talk, share and be themselves. Make sure the videos you upload aren't full of swearing or nudity. Backgrounds- To change a background , click on Edit themes option under your medals. Choose a default theme which you want to show on your profile and click on Save Changes option. To create a theme; Look top corner of your themes and look an option called '' Don't like these times? Create your own''- Click on that. Again look top an option called ''Don't like these? You can create 2 more themes!'' Click on it and change your themes. You can upload a background too. NO NUDITY ON BACKGROUNDS.  Favorites:  Talk of your favorite movies on favorites. :) You need to activate your favorites widget before you post any favorites. Interest- What's your favorite music type? Would you rather roleplay or go to chat, or both?! Select your interests and you will be connected with new friends just like you from around the world! To fill the interests , go to your settings and look right an option called ''My interest''..fill that and click on save changes below. Clickable Links-  Copy the URL of the page then Type a word then underline that & press CTRL+L , it'll show you a box paste the url into it. it'll turned to clickable link.. Marquee Tag- Usually people use marquee tag in status , by the way. To use marquee tag..Use alligator mouse. Like - <***Marquee*****> Your text here. <******/Marquee*****> Use everything what I used except the '' * '' symbol. DO NOT GIVE YOUR PASSWORD. EVER!  Click here for FAQ. Rules. I hope it'll help you. :)
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ProLifeGamer
ProLifeGamer posted in General:
12th of December
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OneDirection30
Maybe.
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OneDirection30
OneDirection30 posted in General:
11th September
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Delancey
Delancey posted in General:
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