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
2023-08-15
44
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/2927093.html
相关试题推荐
[originaltext]Welcometothethirdlectureinourseriesonthefutureofs
[originaltext]Welcometothethirdlectureinourseriesonthefutureofs
[originaltext]Welcometothethirdlectureinourseriesonthefutureofs
[originaltext]Inthepastfewmonths,I’vebeentravelingforweeksatati
[originaltext]Inthepastfewmonths,I’vebeentravelingforweeksatati
[originaltext](13)It’snoaccidentthatmostgasstationshaveconvenience
[originaltext](13)It’snoaccidentthatmostgasstationshaveconvenience
[originaltext](9)DevilsTower,thefirstnationalmonumentinAmerica,coul
[originaltext]ResearchersatHarvardMedicalSchool’saffiliatedHebrewSen
[originaltext]ResearchersatHarvardMedicalSchool’saffiliatedHebrewSen
随机试题
[originaltext]W:IsMaryreadytogototheairport?M:Ready?Shehasn’tevenfi
C各项重新变形后,底数为5X1,5X11,5X11X11,5X11X11X11,所以下一项应为5X11X11X11X11,即为C。
妊娠3~5个月胚胎期的主要造血器官是()A.肝 B.脾 C.胸腺
下方分别是一个由长方体堆积而成的立体图形和该立体图形的左视图、后视图,那么该立体
迎香穴位于A.鼻孔外缘,旁开0.5寸 B.鼻翼外缘,旁开0.5寸 C.
A.出血性膀胱炎B.肾脏毒性C.心脏毒性D.过敏反应E.乙酰胆碱综合征环磷酰胺
假定风荷载沿高度呈倒三角形分布,地面处为0,屋顶处风荷载设计值q=134.7kN
(2017年5月)()的首要工作是组织好部门员工实施项目任务和协调上下
(2018年真题)假设其他条件不变,我国东北灾害性天气的出现,将对()期货
甲股份公司共有股权1000万股,为了将来有更好的发展,将80%的股权让乙公司收购
最新回复
(
0
)