首页
登录
职称英语
[originaltext]In 1984, the World Chess Championship was called off abruptly, du
[originaltext]In 1984, the World Chess Championship was called off abruptly, du
游客
2024-03-11
21
管理
问题
In 1984, the World Chess Championship was called off abruptly, due to the withered frame of a player who was competing for the title. He wasn’t alone in experiencing the extreme physical effects of the game. Elite players can reportedly burn up to an absurd 6,000 calories in one day. Does that mean that thinking harder is a simple route to losing weight?
Well, when the body is at rest, we know that the brain uses up a startling 20%-25% of the body’s overall energy. This level of utilization actually makes the brain the most energy-expensive organ in the body, and yet it makes up only 2% of the body’s weight, overall. So the more we put this organ to work, the more calories we’ll burn? Technically, the answer is yes, for cognitively difficult tasks. What counts as a “difficult” mental task varies between individuals. But generally, it could be described as something that the brain cannot solve easily using previously learned routines, or tasks that change the conditions continuously. However, deep thinking will not burn off the calories gained from eating a sugary snack. Because in relation to the brain’s huge overall energy usage, which is devoted to a multitude of tasks, the energy required just to think harder is actually comparatively tiny.
We are unconscious of most of what uses up the brain’s energy. A lot of that activity is unrelated to conscious activities like learning how to sing or play the guitar. The brain is able to allocate blood and thus energy to particular regions that are being active at that point. But the overall energy availability in the brain is thought to be constant. So, while there might be significant increases in energy use at localized regions of the brain when we perform difficult cognitive tasks, when it comes to the whole brain’s energy budget overall, these activities don’t significantly alter it. So why did the chess champion grow too skinny to compete in his chess competition? The general consensus is that it mostly comes down to stress and reduced food consumption, not mental exhaustion. Keeping your body pumped up for action for long periods of time is very energy demanding. If you can’t eat as often or as much as you can or would normally- then you might lose weight.
Questions 19 to 21 are based on the recording you have just heard.
19. What do we learn about the brain when the body is at rest?
20. What does the speaker say about the consumption of the brain’s energy?
21. What do we learn about the overall energy availability in the brain?
选项
A、Much of the consumption has nothing to do with conscious activities.
B、It has something to do with the difficulty of the activities in question.
C、Energy usage devoted to active learning accounts for a big part of it.
D、A significant amount of it is for performing difficult cognitive tasks.
答案
D
解析
细节推断题。当讲到“是否我们使用大脑越多,我们消耗的能量就越多时”,讲话者说,“严格说来是这样的,但仅限于那些困难的认知任务。”
转载请注明原文地址:https://tihaiku.com/zcyy/3525568.html
相关试题推荐
[originaltext]W:2millionhighschoolseniorsaregearingupthisfalltoappl
[originaltext]W:We’veallheardthesaying“Laughteristhebestmedicine.”Ho
[originaltext]W:We’veallheardthesaying“Laughteristhebestmedicine.”Ho
[originaltext]Manypeoplewhodrinkalcoholalsoliketosmokecigarettes.Drin
[originaltext]Manypeoplewhodrinkalcoholalsoliketosmokecigarettes.Drin
[originaltext]Manymigrantwomengotoworkinprivatehomesascleaners,cooks
[originaltext]Moderator:Goodmorning,class.TodayProfessorLiuwillgiveus
[originaltext]Moderator:Goodmorning,class.TodayProfessorLiuwillgiveus
[originaltext]Forthreegroupsofexplorersformedbycollegestudentsandyoun
[originaltext]Forthreegroupsofexplorersformedbycollegestudentsandyoun
随机试题
MostpeoplesaythattheUSAismakingprogressinfightingAIDS,buttheyd
[originaltext]Arecentfilm,TheGodsMustBeCrazy,describedthesocialc
Budgetconstraintshavemadepoliceofficialsconsiderreassigningaconsiderabl
与百草枯对肺的损伤作用有关的是A.氨基酸摄取途径 B.葡萄糖摄取途径 C.脂
当投资者预期国债基差将要扩大时,他可以进行买入基差交易,影响买入基差的因素包括(
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性: A.如
与第二次世界大战之前的资本主义相比,当代资本主义生产关系中的社会阶层、阶级结构发
()指借款人不能或不希望按照贷款协议规定的还款计划按时偿付每期应偿付的贷款
一项合同要被分类为租赁,必须要满足()。A.存在一定期间 B.存在已识别资
甲、乙两公司签订一份建筑材料采购合同,合同履行期间因甲公司兼并乙公司致使该合同终
最新回复
(
0
)