英语听力 学英语,练听力,上听力课堂! 注册 登录
> 在线听力 > 有声读物 > 英语杂志 > 英语听力文摘 >  第755篇

英语听力文摘742 脂肪储存的来龙去脉

所属教程:英语听力文摘

浏览:

2018年11月09日

手机版
扫描二维码方便学习和分享
https://online2.tingclass.net/lesson/shi0529/0007/7643/742.mp3
https://image.tingclass.net/statics/js/2012
The Ins And Outs Of Fat Storage

When you eat a fatty food, it moves through the stomach and on to the intestines. In the intestines, a number of processes occur to transfer fat from the food to special fat cells in your body.

First, the gall bladder produces bile that breaks the food’s fat droplets into smaller droplets. Next, the pancreas secretes enzymes that attack the fat droplets and break them down into two parts: fatty acids and glycerol.

This happens because fat droplets are too big to pass through cell membranes. The broken down fat is absorbed by the cells lining the intestine, where it is reassembled into fat molecules and eventually shuttled into the bloodstream with the help of lipoprotein particles.

For the most part fat is stored in the fat cells that compose fatty tissue. Think of a fat cell as a tiny plastic bag filled with a drop of fat. Interestingly, fat cells do not multiply. The body contains a finite number of fat cells that expand as they absorb fat.

So how can you make those fat cells smaller? Eat well and exercise. When you work out, your body burns energy, primarily in the form of glucose. After breaking down stores of carbohydrates to produce glucose, the body goes after fat, which it breaks down into fatty acids that can also be used to make glucose.

用户搜索

疯狂英语 英语语法 新概念英语 走遍美国 四级听力 英语音标 英语入门 发音 美语 四级 新东方 七年级 赖世雄 zero是什么意思汕头市金誉花园英语学习交流群

网站推荐

英语翻译英语应急口语8000句听歌学英语英语学习方法

  • 频道推荐
  • |
  • 全站推荐
  • 推荐下载
  • 网站推荐