首页
登录
职称英语
Every living thing has an inner biological clock that controls behavior. The
Every living thing has an inner biological clock that controls behavior. The
游客
2025-04-16
13
管理
问题
Every living thing has an inner biological clock that controls behavior. The clock works all the time even when there are no outside signs to mark the passing of time. The biological clock tells plants when to form flowers and when the flowers should open. It tells insects when to leave the protective cocoon and fly away. And it tells animals when to eat, sleep and wake. It controls body temperature, the release of some hormones and even dreams. These natural daily events are circadian rhythms.
Man has known about them for thousands of years. But the first scientific observation of circadian rhythms was not made until 1729. In that year French astronomer, Jean-Jacques d’Ortous de Mairan, noted that one of his plants opened its leaves at the same time every morning, and closed them at the same time every night. The plant did this even when he kept it in a dark place all the time. Later scientists wondered about circadian rhythms in humans. They learned that man’s biological clock actually keeps time with a day of a little less than 25 hours instead of the 24 hours on a man-made clock. About four years ago an American doctor, Eliot Weitzman, established a laboratory to study how our biological clock works. The people in his experiments are shut off from the outside world. They are free to listen to and live by their circadian rhythms. Dr. Weitzman hopes his research will lead to effective treatments for common sleep problems and sleep disorders caused by aging and mental illness. The laboratory is in the Monteflore Hospital in New York City. It has two living areas with three small rooms in each. The windows are covered, so no sunlight or moonlight comes in. There are no radios or television receivers. There is a control room between the living areas. It contains computers, one-way cameras and other electronic devices for observing the person in the living area. The instruments measure heartbeat, body temperature, hormones in the blood, other substances in the urine and brain waves during sleep. A doctor or medical technician is on duty in the control room 24 hours a day during an experiment They do not work the same time each day and are not permitted to wear watches, so the person in the laboratory has no idea what time it is. In the first four years of research, Dr Weitzman and his assistant have observed 16 men between the ages of 21 and 80. The men remained in the laboratory for as long as six months. Last month, a science reporter for The New York Times newspaper, Dava Sobol, became the first woman to take part in the experiment. She entered the laboratory on June 13th and stayed for 25 days. Miss Sobol wrote reports about the experiment during that time, which were published in the newspaper. [br] What is Mr. Weitzman’s ultimate purpose of establishing a laboratory?
选项
A、He wanted to have his experiment report published in the newspapers
B、People are free to listen to and live by their circadian rhythms
C、He wanted to find a way to treat people’s diseases
D、He could gain some reputation for the first scientific observation of circadian
答案
C
解析
转载请注明原文地址:https://tihaiku.com/zcyy/4039938.html
相关试题推荐
EveryyearNewZealanderslivinginLondoncanbeseenloadingupKombivans
EveryyearNewZealanderslivinginLondoncanbeseenloadingupKombivans
Inapurelybiologicalsense,fearbeginswiththebody’ssystemforreactin
Inapurelybiologicalsense,fearbeginswiththebody’ssystemforreactin
Inapurelybiologicalsense,fearbeginswiththebody’ssystemforreactin
Everylivingthinghasaninnerbiologicalclockthatcontrolsbehavior.The
Everylivingthinghasaninnerbiologicalclockthatcontrolsbehavior.The
Everylivingthinghasaninnerbiologicalclockthatcontrolsbehavior.The
Everylivingthinghasaninnerbiologicalclockthatcontrolsbehavior.The
Jimmyearnshislivingby______worksofartinthemuseum.(中南大学2007年试题)A、renewin
随机试题
[originaltext]W:Hi,Judy,mindifIsitdown?M:Notatall,Steven.Howhave
Whatdoesthepassagemainlydiscuss?[br]Itcanbeinferredfromthepassaget
(2016年)某生产企业2016年5月将机器运往境外修理,出境时已向海关报明,并
下列哪项不是义齿就位困难的原因A.支托位置不当 B.基托进入倒凹区 C.组织
2015年1月1日,长城公司支付2360万元购入360万元购入甲公司于当日发行的
计算某股票A的贝塔系数需要的条件是()。A:股票A与市场投资组合M之间的协方差
关于特许经营合同订立程序的法定性,下列说法错误的是()。A、政府作为特许经营合同
温经汤组成药物中有A.山萸肉 B.桂枝 C.麦冬 D.丹皮
下列关于非结算会员期货交易违约责任承担的表述,错误的是()。A.全面结算会员期
(2017年真题)某企业2020年度拥有位于市郊的一宗地块,其地上面积为1万平方
最新回复
(
0
)