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
39
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
Adultswhohadbeenfedplentyoffruitwhentheywerechildrenarelesslik
Technologicalinventionhasdirectlyorindirectlyproducedsocialchangein
工程项目预算估算的精确度在( )之间,一般被认为比较合理。A.-25%~75%
网络逻辑结构设计的内容不包括()A.逻辑网络设计图 B.IP地址方案
按照有关规定,中小型机械的残值率为( )。A.2% B.3% C.4%
某护士误将甲床患者的青霉素输给乙床患者,造成乙床患者因青霉素过敏死亡,该事件属于
某地级市的交通管理局为了治理本市交通拥堵,需要对本市的汽车销售情况、人们出行情况
I=∮C|y|ds的值为下列()项,其中C:(x2+y2)2=a2(x2
下列关于工业建筑之间的防火间距的说法中,错误的是()。A.某建筑高度30m的难
股利贴现模型包含的概念有()。A:各期股利B:贴现率C:净现值D:股票面值
最新回复
(
0
)