I’veoftenwonderedhowexactlysleep,orlackofit,canhavesuc...
问题详情:
I’ve often wondered how exactly sleep, or lack of it, can have such an awful effect on our bodies and, guess what, how much we sleep switches good genes(基因) on and had genes off.
In the first half of 2013, the Sleep Research Centre at the University of Surrey found a direct link between hours spent sleeping and genes. Every cell in our bodies carries genetic instructions in our DNA that act as a kind of operating handbook. However, each cell only “reads” the part of this handbook it needs at any given moment.
Can sleep affect how a gene reads instructions? It’s a question asked by Professor Derk-Jan Dijk at the University of Surrey. He set up an experiment and asked his volunteers to spend a week sleeping around seven and a half hours to eight hours a night and the next sleeping six and a half to seven hours.
Blood samples were taken each week to compare which genes in blood cells were being used during the long and short nights. The results were rather surprising. Several hundred genes changed in the amount they were being used, including some that are linked to heart disease, cancer, and Type 2 diabetes. Genes to do with cell repair and replacement were used much less.
Sleep restriction(six and a half to seven hours a night) changed 380genes. Of these, 220 genes were down regulated (their power was increased). Those affected included body-clock genes which are linked to diabetes(糖尿病). One of the most downgraded genes is that which has a role in controlling insulin(胰岛素) and is linked to diabetes and insomnia(失眠). The most upgraded gene is linked to heart disease.
So changing sleep by tiny amounts can upgrade or downgrade genes that can influence our health and the diseases we suffer from when we sleep too little.
The important message is that getting close to eight hours of sleep a night can make a dramatic difference to our health in just a few days through the way it looks after our genes.
kind of relation is directly discussed in the passage?
A. Sleeping hours and changes of genes. B. Sleeping hours and diseases.
C. Changes of genes and diseases. s and health.
can we learn about Professor Derk-Jan Kijk’s experiment?
A. The experiment was carried out to find the answer to how genes affect sleep.
B. The experiment took a period of more than two weeks to reach a conclusion.
C. His volunteers were divided into two groups with two different sleeping patterns.
D. Blood samples of the volunteers were checked afterwards to decide how many genes changed in sleeping.
h of the following may be concluded from the passage?
A. The experiment was performed at the University of Surrey in early 2013.
B. Body-clock genes are associated with heart disease, cancer and Type 2 diabetes.
C. Sleep restrictions may contribute to disease like diabetes, insomnia, and heart disease.
D. 7.5-8 hours’ sleep pattern makes little difference compared with 6.5-7 hours’ sleep pattern.
h of the following can be inferred from the findings of the sleep research?
A. When there is a sleep restriction, genes to do with cell repair and replacement function less.
B. In a sleep, several hundred genes change in the amount. The more changes, the worse results.
C. When genes are up regulated, they do good to health; when genes are down regulated , they do harm to health.
D. Eight hours of sleep a day can be beneficial to our health in that it looks after our genes.
【回答】
ACCD
知识点:科普环保类阅读
题型:阅读理解
-
用若干个体积为1的正方体搭成一个几何体,其正视图、侧视图都是如图所示的图形,则这个几何体的最大体积与最小体积的...
问题详情:用若干个体积为1的正方体搭成一个几何体,其正视图、侧视图都是如图所示的图形,则这个几何体的最大体积与最小体积的差是()A.2B.3C.4D.5【回答】解析:由正视图、侧视图可知,此几何体的体积最小时,底层有5个小正方体,上面有2个小正方体,共7个小正方体;体积最大时,底...
-
如图所示,一质量为m的物块恰好沿着倾角为的斜面匀速下滑。现对物块施加一个竖直向下的恒力F。则物块( ) ...
问题详情:如图所示,一质量为m的物块恰好沿着倾角为的斜面匀速下滑。现对物块施加一个竖直向下的恒力F。则物块( ) A.将减速下滑 B.将加速下滑 ...
-
(1)观察下图,请将下列国家的英文字母代号填入答题卡图中对应的方框内。早期殖*家:A.葡萄牙 B.英国(2)...
问题详情:(1)观察下图,请将下列国家的英文字母代号填入答题卡图中对应的方框内。早期殖*家:A.葡萄牙 B.英国(2)仔细观察该图,据图指出奴隶贸易的主要集运地的分布特点。【回答】 (1)上框B,下框A。(2)主要分布在非洲西海岸和东海岸。知识点:血腥的资本积累题型:综合题...
-
一部欧美资产阶级*的纪录片,介绍了各国通过立法手段来巩固*成果,下列解说词中说法错误的是A.英国颁布了《权...
问题详情:一部欧美资产阶级*的纪录片,介绍了各国通过立法手段来巩固*成果,下列解说词中说法错误的是A.英国颁布了《权利法案》 B.美国*战争期间颁布《*宣言》C.法国大*期间颁布《*宣言》 D.美国南北战争期间颁布《1787年宪法》【回答】D知...
相关文章
- Everwalkedtotheshopsonlytofind,oncethere,you’vecomplete...
- TodayI’dliketoshareoneofmyunforgettableexperiencewithev...
- Hegotwellpreparedforthejobinterview,forhecouldn’trisk
- TakeActionforaBetterWorld:VolunteersNeededSixmonths’pre...
- Ifoverweightpeopleeatlessandtakemoreexercise,they’llso...
- Forthosewhostudythedevelopmentofintelligence(智力)inthean...
- Atonetime,computerswereexpectedlargelytoremovetheneedf...
- Weallknowthat2016isconsideredtheyearofsuperheromovies....
- Recently,we’veoftenheardaboutearthquakesinsomeplacesint...
- Idon’tlikethecoloroftheshoes. Would youpleasegiveme