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
医学
The brain is organized into different regions, each responsible for different functions, and in humans this organization is very
The brain is organized into different regions, each responsible for different functions, and in humans this organization is very
admin
2013-12-06
100
问题
The brain is organized into different regions, each responsible for different functions, and in humans this organization is very marked. The largest parts of the brain are the cerebral hemispheres, which occupy most of the interior of the skull. They are layered structures, the most complex being the outer layer, known as the cerebral cortex, where the nerve cells are extremely densely packed to allow great interconnectivity. Its function is not fully understood, but we can get some indication of its purpose from studies of animals that have had it removed. A dog, for example, can still move in a coordinated manner, will eat and sleep, and even bark if it is disturbed. However, it also becomes blind and loses its sense of smell-more significantly, perhaps, it loses all interest in its environment, not responding to people or to its name, nor to other dogs, even of the opposite sex. It also loses all ability to learn. In effect, it loses the characteristics that we generally refer to as indicating intelligence-awareness, interest and interaction with an environment, and an ability to adapt and learn. Thus the cerebral cortex seems to be the seat of the higher order functions of the brain, and the core of intelligence.
The cerebral cortex has been the subject of investigation by researchers for many years, and is slowly revealing its secrets. It demonstrates a localization of functions, in that different areas of the cortex fulfill different functions, such as motion control, hearing, and vision. The visual part of the cortex is especially interesting. In the visual cortex, electrical stimulation of the cells can produce the sensation of light, and detailed analysis has shown that specific layers of neurons are sensitive to particular orientations of input stimuli, so that one layer responds maximally to horizontal lines, while another responds to vertical ones. Although much of this structure is genetically pre-determined, the orientation-specific layout of the cells appears to be learnt at an early stage. Animals brought up in an environment of purely horizontal lines do not develop neuron structures that respond to vertical orientations, showing that these structures are developed due to environmental input and not purely from genetic pre-determination. This is called self-organization of the visual cortex since there is no external teacher to guide the development of these structures.
According to the passage, a dog can still move in a coordinated manner, will eat and sleep, and even bark when______is(are)removed.
选项
A、nerve cells
B、the skull
C、the hemispheres
D、the cerebral cortex
答案
D
解析
文章第一段表明“Its function is not fully understood,but we can getsome indication ofits purpose from studies of animals that have had it removed.”这里its function指的就是thecerebral cortex’s function(大脑皮层的功能).同时后面所举的例子就是本题题目所说的狗的情况,因此选D。
转载请注明原文地址:https://kaotiyun.com/show/q5U3777K
本试题收录于:
医学博士外语题库考研分类
0
医学博士外语
考研
相关试题推荐
A、Thestalefoodheate.B、Thefruitjuicehedrank.C、Toomuchfoodheate.D、Thecoldhegot.A男士讲到自己吃了somestaledbreadando
A、Hislanguage.B、Hislimbs.C、Hisbrain.D、Hismind.D录音讲到尽管WashingtonRoebling不能说话也不能走路,但是hismindwasassharpasever.
Everyonehasseenithappen.Acolleaguewhohasbeenexcited,involved,andproductiveslowlybeginstopullback,loseenergy
DearDr.Benjamin,CongratulationsonyournominationasUnitedStatesSurgeonGeneral.Basedonyourextraordinarycareera
Howmuchpaindoanimalsfeel?Thisisaquestionwhichhascausedendlesscontroversy.Opponentsofbiggameshooting,forexam
Howmuchpaindoanimalsfeel?Thisisaquestionwhichhascausedendlesscontroversy.Opponentsofbiggameshooting,forexam
A、Thereplacementoftheharpsichordbythepiano.B、Thedevelopmentofelectronicmusicalinstruments.C、Therelativecostsof
A、Enzymesarewhatmakemanyofthebody’sbiochemicalreactionspossible.B、Enzymesarewhatmakemanyofthebody’schemicalr
A、Theelectronicinstrumentismuchmoreexpensive.B、Theelectronicinstrumentisslightlymoreexpensive.C、Thepianoissligh
A、Onealwaysknowswhathismusclesaredoing.B、Oneperformssimpleactionswithoutworking.C、One’smusclesareusedonlytot
随机试题
A.阳斑B.阴斑C.麻疹D.风疹E.隐疹
该患儿最可能的诊断是最必要的实验室检查是
工程项目管理的目标是运用各种知识、技能、手段和方法去满足或超出工程项目各利害关系者的要求和期望,所以我们应从()等方面来理解。
监理规划应包括()内容。
施工总方案包括有()的内容。
基金管理人()是指基金管理人在信息披露过程中,违反相关法律法规和公司规章,对基金投资者形成了误导或对基金行业造成了不良声誉,受到处罚和声誉损失的风险。
儿童体格发育最重要及最常用的形态指标是()。
某省人民政府所在地的市为了加强对流动商贩集中的“再就业一条街的管理,制定了《关于加强再就业一条街流动商贩管理的规定》,下列关于该规定的说法正确的是()。
土地改革运动
设循环队列的存储空间为Q(1:50),初始状态为front=rear=50。经过一系列正常的操作后,front=rear-1。为了在该队列中寻找值最大的元素,在最坏情况下需要的比较次数为
最新回复
(
0
)