首页
登录
职称英语
[originaltext] We’ve been looking at fear from biological perspective. And so
[originaltext] We’ve been looking at fear from biological perspective. And so
游客
2023-08-10
33
管理
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://tihaiku.com/zcyy/2913329.html
相关试题推荐
[originaltext]M:Well,hi,Mrs.Brown.How’syourapartmentworkingoutforyou
[originaltext]Peopleallovertheworldtodayarebeginningtohearandlear
[originaltext]Peopleallovertheworldtodayarebeginningtohearandlear
[originaltext]Moreandmorepeoplearoundtheworldareusingwirelessormo
[originaltext]Supposesomeoneinventedagiftcardsoversatile(多功能的)that
[originaltext]Supposesomeoneinventedagiftcardsoversatile(多功能的)that
[originaltext]Whencaughtinpouringrainwithoutanumbrella,mostpeoplep
[originaltext]Whencaughtinpouringrainwithoutanumbrella,mostpeoplep
[originaltext]Whencaughtinpouringrainwithoutanumbrella,mostpeoplep
[originaltext]W:(5)Whatdoyouthinkaboutthemovie?M:Well...(6)IthinkH
随机试题
DothefollowingstatementsagreewiththeinformationgiveninReadingPassage
Forthispart,youareallowed30minutestowriteanessaycommentingonth
[originaltext]M:Didyoureallygiveawayallyourfurniturewhenyoumovedint
NarratorListentopartofaconversationbetweenastudentandaprofessor.Now
Normallyastudentmustattendacertainnumberofcoursesinordertogradu
A.65岁以下患者预后不良 B.日常生活受限 C.即使运动试验异常预后仍然良
国家所有权的取得方式包括( )。A.积累 B.税收 C.没收 D.征用
下列关于垂体瘤的描述中,不正确的是A.垂体瘤90%为良性肿瘤 B.如分泌催乳素
甘草能A.理气止痛 B.散寒止痛 C.缓急止痛 D.柔肝止痛 E.化瘀止
火灾自动报警系统的专用导线或电缆应采用()型屏蔽电缆。(A)阻燃(B)阻水
最新回复
(
0
)