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科学美国人60秒:日光浴-托福听力下载

2017-01-12 18:04:25来源：科学美国人60秒

点击查看>>科学美国人60秒音频：日光浴

　　科学美国人60秒中英文翻译：日光浴

　　科学美国人60秒英文文本

　　You may love to soak up the sun—or the UV rays at the tanning salon.

　　But are you actually addicted?

　　A study finds that mice regularly exposed to UV produced the feel-good opioid β-endorphin, and behaved like addicts.

　　What's more, when they were given a drug that blocked the opioid effects, they went through the rodent equivalent of withdrawal:

　　shaky paws and chattering teeth.

　　日光浴.jpg

　　The study is in the journal Cell.

　　The mice were exposed to UV light roughly on par with a fair-skinned human soaking up a half-hour of Florida midday sun, five days a week for a month-and-a-half.

　　But it took just one week for the endorphin levels to zoom.

　　Mice are normally nocturnal and, of course, covered by fur.

　　But the research team says that the apparent physical reward for UV exposure suggests it's worth exploring if a similar chemical reaction may be spurring humans to keep running to the beach or tanning bed.

　　They also say it's likely sunblock would protect against these UV-induced addictive behaviors.

　　Yet another reason to slather on the sunscreen.

　　中文翻译请点击下一页

本文关键字: 科学美国人60秒 科学60秒下载 托福听力

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