关注微信领¥50

百门课程¥0元


50万+已关注

科学美国人60秒:高脂饮食因肠道细菌致肥胖-托福听力下载

2016-11-24 11:33:00来源:科学美国人60秒

点击查看>>科学美国人60秒音频:高脂饮食因肠道细菌致肥胖

  科学美国人60秒中英文翻译:高脂饮食因肠道细菌致肥胖

  科学美国人60秒英文文本

  This is Scientific American — 60-Second Science. I'm Karen Hopkin.

  Got a minute?

  Think it's your inability to resist cheesecake that's making it tough to fit into your skinny jeans? Well, your bacteria may share some of the blame. Because a new study in mice shows that the response of intestinal microbes to a high-fat diet ends up triggering the release of a hormone that makes mammals feel hungry, causing them to eat even more. The finding is served up in the journal Nature.

  Previous work has shown that the types of bacteria in the gut in diabetic or obese individuals are different from the bacteria in healthy people. But does this bacterial makeup contribute to these disorders? Or is it just a side effect?

  To unravel this mystery, researchers put mice on a high-fat diet. The animals experienced a buildup of a chemical called acetate, particularly in the large intestine.

  That location points to gut bacteria, which can produce acetate, as a possible culprit. So the researchers wiped out the microbes using antibiotics or a simple saline wash. And acetate levels plummeted.

  Okay, so the gut bacteria in fat-fed mice make acetate. What does acetate do? Well, it gets the involuntary part of the nervous system, the parasympathetic nervous system, to put out the call to produce more insulin. Unfortunately, in this case, acetate also gets the parasympathetic nervous system to stimulate production of a hunger hormone called ghrelin. And the more fats an animal consumes, the more acetate it makes — which means the more ghrelin it produces and, of course, the more it eats. And bacteria make the whole sequence happen.

  The researchers are now investigating whether the same biochemical events happen in humans. If they do, it's possible that obtaining a better assortments of gut bacteria could help us control our weight. Of course, the best way to get those good bacteria is from a fecal transplant — in which bacteria-rich feces come out of one person and into you. The very thought of which could help curb your appetite.

  Thanks for listening Scientific American - 60-Second Science Science. I'm Karen Hopkin.

  中文翻译请点 击下一页

为你特别匹配的托福超值课程,快速提分先人一步!
  • 托福12月公益课(第2期)

    托福12月公益课(第2期)

    特点:1天1节公益课,讲干货有实力,高效备考,快速突破!

    课时:10小时

    查看详情
  • 【活动价】新东方托福名师在线一对一(体验课)

    【活动价】新东方托福名师在线一对一(体验课)

    适合人群:想体验新东方在线致赢托福1对1辅导冲分课程的同学

    体验课时:30分钟

    查看详情
  • 大学生旗舰直达班 (冲110分)

    【知心托福】大学生旗舰直达班 (冲110分)

    适合人群:托福目标分数110分!

    课时:343

    查看详情
  • 大学生旗舰直达班 (冲100分)

    【知心托福】大学生旗舰直达班 (冲110分)

    适合人群:托福目标分数100分!

    课时:331

    查看详情
  • 大学生旗舰直达班 (冲90分)

    【知心托福】大学生旗舰直达班 (冲90分)

    适合人群:托福目标分数90分!

    课时:310

    查看详情
全部课程>>
单项突破
直播课堂

更多托福课程
新东方25年教学经验沉淀
托福考生必修课
托福考生,高效提分,安心之选

查看详情>>
更多>>
更多课程>>
更多>>
更多内容
更多>>
距结束 : 00 00 00 00

4小时甩掉“Broken English”,直击托福24+

实战经验分享三人成团免费学

口语6大题精讲;16天社群打卡学习&答疑 活动日期 : 2018.11.08-2018.12.13

价格 : ¥69

678人 已报名

查看详情
更多>>
更多公开课>>
更多>>
更多课程>>