首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Spending 50 minutes with a cell phone close to your ear is enough to change brain cell activity in the part of the brain closest
Spending 50 minutes with a cell phone close to your ear is enough to change brain cell activity in the part of the brain closest
admin
2016-09-28
94
问题
Spending 50 minutes with a cell phone close to your ear is enough to change brain cell activity in the part of the brain closest to the antenna(天线). But whether that causes any harm is not clear, scientists at the National Institute of Health said at a conference last month, adding that the study will not likely settle concerns of a link between cell phones and brain cancer. "What we showed is glucose(葡萄糖)metabolism(代谢)(a sign of brain activity)increases in the brain in people who were exposed to a cell phone in the area closest to the antenna," said Dr. Nora Volkow of the NIH, whose study was published in the Journal of the American Medical Association. The study was meant to examine how the brain reacts to electromagnetic fields caused by wireless phone signals.
Volkow said she was surprised that the weak electromagnetic radiation(电磁辐射)from cell phones could affect brain activity, but she said the findings do not shed any light on whether cell phones cause cancer. "This study does not in any way indicate that. What the study does is to show the human brain is sensitive to electromagnetic radiation from cell phone exposures. " Use of the devices has increased dramatically since they were introduced in the early 1955 s, with about 5 billion cell phones now in use worldwide.
Some studies have linked cell phone exposure to an increased risk of brain cancers, but a large study by the World Health Organization did not offer a clear answer to this. Volkow’ s team studied 47 people who had their brain examined while a cell phone was turned on for 50 minutes and another while the phone was turned off. While there was no complete change in brain metabolism, they found a 7 percent increase in brain metabolism in the region closest to the cell phone antenna when the phone was on.
Experts said the results were interesting, but urged that they be understood with great care. " Although the biological significance, if any, of increased glucose metabolism from too much cell phone exposure is unknown, the results require further investigation," Henry Lai of the University of Washington in the U. S. and Dr. Lennart Hardell of University Hospital in Sweden, wrote in an article in JAMA. "Much has to be done to further investigate and understand these effects. " They wrote.
Doctor Volkow was astonished because______.
选项
A、her research has shed light on her understanding of cell phone
B、she found that cell phone exposure is harmful to human brain
C、she found that using a cell phone for about 50 minutes could influence or change brain activity
D、human brain is not responsive to electromagnetic radiation
答案
C
解析
事实细节题。根据第二段第一句话,即沃尔考说,手机发出的弱电磁辐射可能会影响大脑的活动,她对此很惊讶…。故选C。
转载请注明原文地址:https://kaotiyun.com/show/6ZRO777K
0
成人本科学位英语
相关试题推荐
Thebookwasso(bored)thatI(returned)it(tothelibrary)without(finishing)it.
Theelderlyneedspecialcareinwinter,astheyare______tothesuddenchangeofweather.
(Ageneralhospital)isone(which)patients(with)allkindsofdiseases(aretreated).
Onthefirstdayofschooloneofmyclassmatesbeganatalkwithmethatchangedmylife.Shesaid,"Hi,handsome.MynameisR
Usuallyachild’sbehaviorisa______ofhisfamilyenvironment.
MrSmithfeelsgreatly______withhisson’sperformanceinschoolasheisalwaysthetopofhisclass.
Scientistssayitmaybefiveortenyears______itispossibletotestthismedicineonhumanpatients.
NursingatBethIsraelHospitalproducesthebestpatientcarepossible.Ifwearetosolvethenursingshortage,hospitaladmin
—I’msorryforlosingyourbook.Iwillbuyanewoneforyou.—______.Ihaveanothercopy.
随机试题
A.免疫荧光法和FACS分析B.ELISAC.混合淋巴细胞培养D.51Cr释放实验E.淋巴细胞转化实验
不可引起咯血的疾病是
孕妇,26岁,G1Po,孕36周,产前检查发现血压135/105mmHg,尿蛋白微量,伴下肢水肿(+),诊断为轻度妊高征。下列的指导错误的是
自行编制的会计软件,程序开发人员可以进行凭证录入工作。()
会计科目的设置应当()。
甲公司2015年年度财务报表于2016年4月10日对外报出。假定其2016年发生的下列有关事项均具有重要性,甲公司应当据以调整2015年财务报表的是()。
甲企业为了实施风险管理,而发生了如下费用,其中属于有形成本的有()。
关于注册会计师对期后事项的责任,下列表述中,错误的是()。
航空主运单
HowDoYouSeeDiversity?A)Asamanager,Tiffanyisresponsibleforinterviewingapplicantsforsomeofthepositionswithher
最新回复
(
0
)