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
58
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
Whilethemissionofpublicschoolshasexpandedbeyondeducationtoincludesocialsupportandextra-curricularactivities,the
AgehasitsprivilegesinAmerica,andoneofthemoreprominentofthemistheseniorcitizendiscount.Anyonewhohasreached
Thedesireforachievementisoneoflife’sgreatmysteries.Socialscientistshavedevotedlifetimesstudyingthedrivesthats
It’sagoodideatoapplysunscreenbeforeheadingtothebeachifyoudon’twanttoburn.Butformarineanimalslikewhales,t
Oncetheydecidedtohavechildren,MiShelandCarlMeissnertackledthenextbigissue:Shouldtheytrytohaveagirl?Itwas
Aristotledefinedafriendas"asinglesouldwellingintwobodies".MembersofFacebookwhose"friends"reachtriplefiguresm
Moneycanbuyhappiness,butonlyifyouspenditonsomeoneelse,researchersreported.Spendingaslittleas$5adayons
A、Atouraroundthecity.B、Acruisealongtheriver.C、Avisitaroundthecampus.D、Discussionandsomeseminars.B男士在说到对代表团的活动
A、Inacrowdedclassroom.B、Inanemptyroom.C、Inabusystreetcorner.D、Inashoppingcentre.B推断题。根据Whatanice,quietspota
中国的龙是中国神话和民间故事里传说的生物。龙有许多动物的特征,例如龟、鱼等。但是,大多情况下龙被描绘成长着四只脚的蛇形动物。传统意义上龙象征强大的、幸运的力量,特别是能够控制水、雨、飓风和洪水。龙还能带给人权利,力气和好运。因此,中国的皇帝常常用龙来象征他
随机试题
It’snogreatsurprisethatBillGateshasdecidedtowalkawayfromhisday-to-dayinvolvementwithMicrosoft,andusehisful
患者因半年来右下后牙咬物不适就诊。检查见右下第一磨牙咬合面深龋洞,冷测一过性疼痛。去净腐质后近髓,未及明显露髓孔。该患牙的首诊治疗为
七届人大一次会议通过的宪法修正案规定:“任何组织或者个人不得()或者以其他形式非法转让土地。土地的使用权可以依照法律的规定转让。”
建设工程质量保修期按《建设工程质量管理条例》的规定确定。在质量保修期内的监理工作期限,应由监理单位与建设单位根据工程实际情况,在委托监理合同中约定,一般以()为宜。
关于工程量计算的注意事项说法错误的是()。
应收账款信用政策中的信用条件包括()。
江西省国家历史文化名城为()。
(),是指行为人实施旅游违法行为尚未构成犯罪,由旅游或其他行政管理部门追究,而且必须接受的强制性义务。
近期土地价格的下跌已经使许多在房地产上大量投资的机构受到了损害。去年,在这次价格下跌尚未开始的时候,一所地方大学为其资产增加了200英亩的土地。当然,这所大学并未购买这块土地,而是作为馈赠接受下来的。所以价格下降并没有影响到该大学。下面哪项,如果正确,对以
Whyisthewoman’sfathergoingtoretire?
最新回复
(
0
)