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
外语
A、The extent of damage to the nervous system. B、The presence or absence of certain nerve-cell receptors. C、The size of nerve-cel
A、The extent of damage to the nervous system. B、The presence or absence of certain nerve-cell receptors. C、The size of nerve-cel
admin
2019-10-03
55
问题
We’ve been looking at fear from biological perspective. And someone asked whether the tendency to be fearful is genetic. While some study done with mice indicate that mammals do inherit fearfulness to some degree. In one study for instance, a group of mice were placed in the bright lit open boxes with no hiding places. Some of the mice wondered around the box and didn’ t appear to be bothered about being so exposed. But other mice didn’ t move. They stayed up against one wall, which indicate that they were afraid. Well, when fearful mice or you might say anxious mice like ones who stayed in one place. When mice like this were bred with one another repeatedly, after about 12 or so generations, then all of the offspring show similar signs of fearfulness. And even when the new born mouse from this generation was raised by a mother and with other mice who were not fearful, that mice still tend to be fearful as the result. Now, why is this? Well, it’s thought that the specific gene in animal body have influenced on the anxious behavior. These genes that are associated with particular nerve cell receptors in brain. And the degree of overall fearfulness in the mammal seem to depend in the large part on the presence or absence of these nerve cell receptors. And this appears to apply to humans as well by the way. But while the tendency towards anxiety and fear may well be an inherited trait, but the specific form that the fear takes has more to do individual environment. So a particular fear like the fear of snakes or the fear of spider, say, is not genetic. But the overall tendency to have fearful responses is.
Now listen to the following recording and answer questions 16 to 18.
16. How did some of the mice in the study demonstrated that they were afraid?
17. According to the professor, what contribute to a mammal tendency to be fearful?
18. Why does the professor mention snakes and spiders?
选项
A、The extent of damage to the nervous system.
B、The presence or absence of certain nerve-cell receptors.
C、The size of nerve-cell receptors in the brain.
D、The level of danger in the mammal’ s environment.
答案
B
解析
细节题。根据And the degree of overall fearfulness in the mammal seem to depend in the large part on the presence or absence of these nerve cell receptors.可知,正确答案为B。
转载请注明原文地址:https://kaotiyun.com/show/R0W7777K
0
大学英语六级
相关试题推荐
MarieCuriewasthefirstfemaleprofessoratSevres,acollegeforgirlswhowantedtoteachhighereducation.Thesetwenty-yea
FortravelerstoEurope,fromJanuary2002there’ssomethingspecialonofferbesidesalltheusualsights.It’sthechancetob
Thedesireforachievementisoneoflife’sgreatmysteries.Socialscientistshavedevotedlifetimesstudyingthedrivesthats
Nottoomanydecadesagoitseemed"obvious"bothtothegeneralpublicandtosociologiststhatmodemsocietyhaschangedpeopl
Aristotledefinedafriendas"asinglesouldwellingintwobodies".MembersofFacebookwhose"friends"reachtriplefiguresm
A、Inacrowdedclassroom.B、Inanemptyroom.C、Inabusystreetcorner.D、Inashoppingcentre.B推断题。根据Whatanice,quietspota
A、About3miles.B、Only100miles.C、282feet.D、14,494feet.B细节题。根据文章第三段byadistanceofonly100miles可判断B为正确答案。
A、Itgivesyoutimetodoyourwork.B、Itbringsyoubetterexperience.C、Itcanreducethedeathinroadcrash.D、Itfollowsyo
A、Playingwithparents.B、Talkingwithothers.C、Playingcardswithothers.D、Drawingandmakingthings.D
A、Boysenjoyplayingwithcubesmorethangirls.B、Girlstendtogetexcitedmoreeasilythanboys.C、Girlsseemtostartreason
随机试题
在考生文件夹下的"samp1.mdb"数据库中已经建立表对象"tEmployee"。请按以下操作要求,完成表的编辑:(1)根据"tEmployee"表的结构,判断并设置主键。(2)删除表中的"所属部门"字段;设置"年龄"字段的有效性规则为:只能输入大于
《麻醉药品、精神药品管理条例》关于麻醉药品监督管理,说法正确的是
符合甲状腺功能亢进症代谢率增高的表现是( )。【历年考试真题】
公司可以发行优先股筹集资金,优先股股东()。
根据基本建设程序的规定,在施工图预算之前的工作有()。
货币型理财产品可以被视为活期存款的替代品。()
FortyMayBetheNew30asScientistsRedefineAgeIs40reallythenew30?Inmanywayspeopletodayactyoungerthantheirp
(judge)______frommyexperience,hewillbelate.
【S1】【S2】
Researchershaveestablishedthatwhenpeoplearementallyengaged,biochemicalchangesoccurinthebrainthatallowittoact
最新回复
(
0
)