【科学60秒】越吃越多_英语听力练习mp3下载-科学-沪江听力酷

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【科学60秒】越吃越多

听力简介：

If you could add cells anywhere in your body, you might pick your brain. More brain cells should make you smarter, right? Well, a new study shows that they might just make you fatter. Because animals that make new nerve cells in a brain region that controls hunger tend to pack on the pounds. The results appear in the journal Nature Neuroscience.
In the late 1990s scientists found that adult mammals can make new brain cells in an area associated with learning and memory. Since then, studies have shown that new neurons also arise in the hypothalamus, a structure associated with regulating body temperature, sleep and appetite. So, what are those cells up to?
Using techniques to track the birth of new neurons, researchers found that mice fed a high-fat diet make four times as many new cells in the hypothalamus than do animals raised on standard chow. When the scientists eliminated the source of these new cells, the chubby mice gained less weight.
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But in these boon times, your brain may be your waist enemy.