首页
登录
职称英语
Spending 50 minutes with a cell phone close to your ear is enough to change b
Spending 50 minutes with a cell phone close to your ear is enough to change b
游客
2025-03-04
36
管理
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 1980s, 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. [br] 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://tihaiku.com/zcyy/3982054.html
相关试题推荐
Forthispart,youareallowedthirtyminutestowriteacompositionOnthet
Todayanyonewillacceptmoneyinexchangeforgoodsandservices.Peopleus
Todayanyonewillacceptmoneyinexchangeforgoodsandservices.Peopleus
Forthispart,youareallowedthirtyminutestowriteacompositiononthetopi
Spending50minuteswithacellphoneclosetoyourearisenoughtochangeb
Spending50minuteswithacellphoneclosetoyourearisenoughtochangeb
Spending50minuteswithacellphoneclosetoyourearisenoughtochangeb
Spending50minuteswithacellphoneclosetoyourearisenoughtochangeb
Forthispart,youareallowedthirtyminutestowriteacompositiononthe
________tenminutesearlier,youwouldn’thavemissedthetrain.Butyouwerel
随机试题
InmostAmericancities,therentforaone-bedroomapartmentwas$250ormo
Whetherwewantitornotweareallgreedy(1)_____nature.Fromthemoment
[originaltext]Takecareofyourteethandyourteethwilltakecareofyou.
临床教师阻碍学生学习的行为有()A.经常在病人面前纠正学生的操作错误
如果组成部分注册会计师不能独立于被审计单位及其组成部分,不能胜任其承担的具体审计
财务顾问将申报文件报中国证监会审核期间,委托人和财务顾问终止委托协议的,财务顾问
2020年11月份,社会消费品零售总额39514亿元,同比增长5.0%,增速同比
下列关于个人卫生消毒制度的表述,不正确的是( )。A.幼儿一人一杯一巾,每天消
体循环的动脉栓塞,栓子主要来自( )。A.左心 B.主动脉瓣 C.主动脉粥
慢性肺心病患者提示右心功能不全的主要体征是A.双下肢水肿 B.肝颈静脉回流征阳
最新回复
(
0
)