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  3. 共用题干 第一篇Walking to Exercise the BrainDo

共用题干 第一篇Walking to Exercise the BrainDo

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问题 共用题干第一篇

Walking to Exercise the Brain

Do you think sitting and studying all the time will improve your grades?Think again.Getting some exer-
cise may help,too.
New research with old people suggests that taking regular walks helps them pay attention better than if
they didn't exercise.
Previous research had shown that mice learn,remember,and pay attention better after a few weeks of
working out on a running wheel.Mice that exercise have greater blood flow to the brain than those who don't.
Their brain cells also make more connections.
Neuroscientists（神经科学家）from the University of Illinois at Urbana Champaign wanted to find out if
the same thing is true for people.First,they measured the physical fitness of 41 adults,ages 58 to 77,after
each person walked 1 mile.Then,participants looked at arrows on a computer screen and had to use computer
keys to show which way one particular arrow was pointing.
Adults who were physically fit were faster at the arrow task,and their answers were just as accurate as
their less-fit peers,the researchers found.The fitter participants also had more blood flow to a part of their
brain responsible for paying attention and making decisions.
In a second study , 15 elderly people who completed a 6-month aerobic-training（有氧运动）course were
faster at attention tasks compared with 14 seniors who just did stretching and toning exercises（韵律操）for
the same amount of time.
So,even going for a walk every 2 or 3 days for just 10 to 45 minutes can help.That should be good news
for the elderly.
The effects of exercising on the brains of younger people haven't been studied yet. Still,it can't hurt to
take occasional breaks and go for a walk or run around with friends.Whatever you do,though,don't try to
read and walk at the same time.You could end up hurting yourself!After taking exercise for a few weeks,the mice were found to have______________ A:higher blood pressureB:faster heartbeatC:more blood flow to the brain D:better appearance
选项 After taking exercise for a few weeks,the mice were found to have______________
A:higher blood pressure
B:faster heartbeat
C:more blood flow to the brain
D:better appearance
答案 C
解析 第二段提到：针对老年人的新的研究显示，经常运动能让老年人更好地集中精力。
第三段提到：以前的研究证明老鼠在轮子上奔跑数周后它们的学习、记忆力和精神集 中程度都有所提高。运动的老鼠大脑中的血液流量大于不运动的，它们的脑细胞的联系也更 频繁。
第五段提到：研究员发现身体健康的成年人完成箭头测试的速度更快，他们的答案和 身体状况不佳的参加者一样准确。
第七段提到：每两到三天出去散步仅仅10到45分钟都会对健康有益。
最后一段提到：不要一边走路一边看书，你有可能伤到自己。第二篇 本文介绍了一个有趣的现象：蚂蚁的身体能向外释放一种化学物质将自己的死讯告诉给 同伴。
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