首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
A busy brain can mean a hungry body. We often seek food after focused mental activity, like preparing for an exam or poring over
A busy brain can mean a hungry body. We often seek food after focused mental activity, like preparing for an exam or poring over
admin
2022-01-20
69
问题
A busy brain can mean a hungry body. We often seek food after focused mental activity, like preparing for an exam or poring over spreadsheets. Researchers speculate that heavy bouts of thinking drain energy from the brain, whose capacity to store fuel is very limited. So the brain, sensing that it may soon require more calories to keep going, apparently stimulates bodily hunger, and even though there has been little in the way of physical movement or caloric expenditure, we eat. This process may partly account for the weight gain so commonly seen in college students.
Scientists at the University of Alabama at Birmingham and another institution recently experimented with exercise to counter such post-study food binges. Gary Hunter, an exercise physiologist at U.A.B., oversaw the study, which was published this month in the journal Medicine & Science in Sports & Exercise. Hunter notes that strenuous activity both increases the amount of blood sugar and lactate—a byproduct of intense muscle contractions—circulating in the blood and augments blood flow to the head. Because the brain uses sugar and lactate as fuel, researchers wondered if the increased flow of fuel-rich blood during exercise could feed an exhausted brain and reduce the urge to overeat.
Thirty-eight healthy college students were invited to U.A.B.’ s exercise lab to determine their fitness and metabolic rates—and to report what their favorite pizza was. Afterward, they sat quietly for 35 minutes before being given as much of their favorite pizza as they wanted, which established a baseline measure of self-indulgence. At a later date, the volunteers returned and spent 20 minutes tackling selections from college and graduate-school entrance exams. Hunter says this work has been used in other studies "to induce mental fatigue and hunger." Next, half the students sat quietly for 15 minutes, before being given pizza. The rest of the volunteers spent those 15 minutes doing intervals on a treadmill: two minutes of hard running followed by about one minute of walking, repeated five times. This is the sort of brief but intensive routine, Hunter says, that should prompt the release of sugar and lactate into the bloodstream. These students were then allowed to gorge on pizza, too. But by and large, they did not overeat. In fact, the researchers calculated that the exercisers consumed about 25 fewer calories than they did during their baseline session. The non-exercisers, however, consumed about 100 calories more. When the researchers factored in the calories expended on running, they determined that those students actually consumed 200 fewer total calories after their brain workouts than the resting students.
The study has limitations, of course. "We only looked at lunch," Hunter says; the researchers do not know if the runners consumed extra calories at dinner. They also cannot tell whether other types of exercise would have the same effect as running, although Hunter says they suspect that if an activity causes someone to break into a sweat, it should also increase blood sugar and lactate, feeding the brain and weakening hunger’ s call.
[A] they suspect that an activity causes someone to break into a sweat.
[B] muscles frequently contract.
[C] too much thinking can take the energy totally away from the brain.
[D] the exercisers consumed fewer calories than the non-exercisers.
[E] tremendous activity increases both the blood sugar and lactate.
[F] the exercisers consumed more calories than the non-exercisers.
[G] the researchers are not sure whether other kinds of exercise could have the same effect as running.
The difference of consumed calories between exercis and non-exercisers was that________.
选项
答案
D
解析
根据题干关键词exercisers和consumed定位到第三段倒数第二、三句,即The non-exercisers,however,consumed about 100 calories more和In fact, the researchers calculated that the exercisers consumed about 25 fewer calories than they did during their baseline session,将倒数第二句中的100 calories more与倒数第三句中的25 fewer calories进行对比。可知做运动者摄入的热量少于不做运动者所摄入的热量。故本题选D。
转载请注明原文地址:https://kaotiyun.com/show/r6i4777K
0
考研英语二
相关试题推荐
Educationbeginswithteachers.Yetteachingseemstobelosingitsappealformanyofthebestandbrightestcollegestudents.
Thebesttitleforthispassagewouldbe______.Defenseattorneysarevitaltothejudicialsystembecausewithoutthem,itwo
WholesalepricesinJulyrosemoresharplythanexpectedandatafasterratethanconsumerprices,【1】thatbusinesseswerestill
Thecellphone,adevicewehavelivedwithformorethanadecade,offersagoodexampleofapopulartechnology’sunforeseensi
Homeworkhasneverbeenterriblypopularwithstudentsandevenmanyparents,butinrecentyearsithasbeenparticularlyscorn
OlympicGamesareheldeveryfouryearsatadifferentsite,inwhichathletes【1】differentnationscompeteagainsteachotherin
OlympicGamesareheldeveryfouryearsatadifferentsite,inwhichathletes【1】differentnationscompeteagainsteachotherin
OlympicGamesareheldeveryfouryearsatadifferentsite,inwhichathletes【1】differentnationscompeteagainsteachotherin
Overthepastdecade,manycompanieshadperfectedtheartofcreatingautomaticbehaviors—habits—amongconsumers.Thesehabi
OnWednesday,theEuropeanUnionbroughtdownanantitrustfineof4.34billioneuros—orabout$5.06billion—againstGoogle,
随机试题
患儿,剖宫产,出生后2h皮肤轻度黄染,经蓝光照射,黄疸仍进行性加重,急查肝功:TBIL:315.8μmol/L,DBIL:6.5μmol/L,患儿血清学三项实验均为阳性。其母30岁,无输血史,孕4产2,第一胎产后出现轻度黄疸,但查母子二人血型均为B型。下面
如图所示,1、2两梁相互垂直并在中点相互接触,设两梁材料及长度均相同,而截面的主惯性矩分别为I1和I2,则1、2两梁承受的荷载之比为()。
在公司制期货交易所中,负责期货交易所股东大会和董事会会议的筹备、文件保管以及期货交易所股东资料的管理等事宜的是()。
资本市场是指期限在()的长期资金融通市场。
以下哪个行为是不可诉的内部行为?()
设an>0(n=1,2,…)且{an}n=1∞单调减少,又级数的敛散性。
分配一个32位字存储单元,名为Mydata并对其初始化为0x33445566的伪指令为【55】,无条件转移到标号为MLOOP且不进行模式切换的伪指令为【56】。
有三个关系R,S和T如下图所示:则由关系R和S得到关系T的运算是
某考试网站的主页地址是:HTTP://NCRE/1JKs/INDEX.HTML,打丌此主页,浏览“证书考试”页面,查找“全国电子商务中、高级职业证书考试”页面内容,并将它以文本文件的格式保存到考生文件火下,命名为“liswks08.txt”。
Theoldmansaidhehadlostatleast15headsofcattleinthestorm.
最新回复
(
0
)