GWD25-Q36

dannya

36. GWD25-Q36

The chemical adenosine is released by brain cells when those cells are active. Adenosine then binds to more and more sites on cells in certain areas of the brain, as the total amount released gradually increases during wakefulness. During sleep, the number of sites to which adenosine is bound decreases. Some researchers have hypothesized that it is the cumulative binding of adenosine to a large number of sites that causes the onset of sleep.

Which of the following, if true, provides the most support for the researchers’ hypothesis?

A.Even after long periods of sleep when adenosine is at its lowest concentration in the brain, the number of brain cells bound with adenosine remains very large.

B.Caffeine, which has the effect of making people remain wakeful, is known tointerfere with the binding of adenosine to sites on brain cells.

C.Besides binding to sites in the brain, adenosine is known to be involved inbiochemical reactions throughout the body.

D.Some areas of the brain that are relatively inactive nonetheless releasesome adenosine.

E.Stress resulting from a dangerous situation can preserve wakefulness evenwhen brain levels of bound adenosine are high.

A为什么不对？

fengshou

题中说到During sleep, the number of sites to which adenosine is bound decreases. 跟A相反。

sxf112233

36. GWD25-Q36



The chemical adenosine is released by brain cells when those cells are active. Adenosine then binds to more and more sites on cells in certain areas of the brain, as the total amount released gradually increases during wakefulness. During sleep, the number of sites to which adenosine is bound decreases. Some researchers have hypothesized that it is the cumulative binding of adenosine to a large number of sites that causes the onset of sleep.

CA在大脑活跃时产生，然后A到脑子的某苦处，累的时候全放，在睡觉的时候A下降。因此，睡不着是因为A放了在很多点



Which of the following, if true, provides the most support for the researchers’ hypothesis?
支持



A.Even after long periods of sleep when adenosine is at its lowest concentration in the brain, the number of brain cells bound with adenosine remains very large.
after long periods of sleep 结果对原文无影响，因为说过后无论如何对睡无法有影响


B.Caffeine, which has the effect of making people remain wakeful, is known tointerfere with the binding of adenosine to sites on brain cells.
太像答案了。


C.Besides binding to sites in the brain, adenosine is known to be involved inbiochemical reactions throughout the body.
Besides 。。。throughout the body.范围错了



D.Some areas of the brain that are relatively inactive nonetheless releasesome adenosine.

Some areas可能是或不是原文说的A释放的点，无法驳斥

E.Stress resulting from a dangerous situation can preserve wakefulness evenwhen brain levels of bound adenosine are high.
他因会导致W即便A高，驳斥

Jerrynan

我怎么觉得researchers的假设和题目之前所描述的，是相反的呢？......
请教各位啦~~