首页
登录
职称英语
Australian researchers have discovered electroreceptors(sensory organs designed
Australian researchers have discovered electroreceptors(sensory organs designed
游客
2025-02-26
21
管理
问题
Australian researchers have discovered electroreceptors
(sensory organs designed to respond to electrical fields)
clustered at the tip of the spiny anteater’s snout. The
researchers made this discovery by exposing small areas of
(5) the snout to extremely weak electrical fields and recording
the transmission of resulting nervous activity to the brain.
While it is true that tactile receptors, another kind of
sensory organ on the anteater’s snout, can also respond to
electrical stimuli, such receptors do so only in response to
( 10) electrical field strengths about 1,000 times greater than
those known to excite electroreceptors.
Having discovered the electroreceptors, researchers are
now investigating how anteaters utilize such a sophisticated
sensory system. In one behavioral experiment, researchers
(15) successfully trained an anteater to distinguish between
two troughs of water, one with a weak electrical field
and the other with none. Such evidence is consistent with
researchers’ hypothesis that anteaters use electroreceptors
to detect electrical signals given off by prey; however,
( 20) researchers as yet have been unable to detect electrical
signals emanating from termite mounds, where the favorite
food of anteaters live. Still, researchers have observed
anteaters breaking into a nest of ants at an oblique angle
and quickly locating nesting chambers. This ability quickly
(25)to locate unseen prey suggests, according to the researchers,
that the anteaters were using their electroreceptors
to locate the nesting chambers.
选项
A、The manner in which electroreceptors respond to electrical stimuli
B、The tendency of electroreceptors to be found in clusters
C、The unusual locations in which electroreceptors are found in most species.
D、The amount of electrical stimulation required to excite electroreceptors
E、The amount of nervous activity transmitted to the brain by electroreceptors when they are excited
答案
D
解析
The best answer is D. According to the passage, the electrorecepors in the snouts of spiny anteaters responds to extremely weak electrical fields. In lines 7-11, the author of the passage contrasts these electroreceptors with tactile receptors, stating that it takes field strengths “about 1,000 times greater than those known to excite electroreceptors” to excite the tactile receptors on an anteater’s snout. The passage does not contrast the two types of receptors with regard to the characteristics mentioned in choices A, B, C, and E.
转载请注明原文地址:https://tihaiku.com/zcyy/3974351.html
相关试题推荐
Australianresearchershavediscoveredelectroreceptors(sensoryorgansdesigned
Australianresearchershavediscoveredelectroreceptors(sensoryorgansdesig
Australianresearchershavediscoveredelectroreceptors(sensoryorgansdesig
Australianresearchershavediscoveredelectroreceptors(sensoryorgansdesig
Hotcooilburners,designedtobeusedinasphaltplants,aresoefficientthat
TwosuitsofbattlearmorwornbyKingHenryVIIIwerediscovered,onefromthe
X-rayexaminationofarecentlydiscoveredpainting—judgedbysomeauthorities
Aresearcherdiscoveredthatpeoplewhohavelowlevelsofimmune-systemactivit
Aresearcherdiscoveredthatpeoplewhohavelowlevelsofimmune-systemactivit
ManyresearchersbelievethatthepresenceofRNAinbraincellsisthebiochemi
随机试题
TothewestofmainlandAmericaliesthe______.A、AtlanticOceanB、PacificOcean
Thefirstpermanentshelterswereprobablybuilttwentyorfortythousandye
Dependingonwhichplayeryouask,the"Fevernova"ballthatsportsequipmen
工业废水排放达标量包括()。A.未经处理外排达标量 B.经过处理后外排
烧伤休克时,下列不属于血流动力学紊乱指标的是A.CO B.CI C.LVWI
下列关于影响贷款价格的因素的说法,错误的是( )。A.借款人的信用越好,货款风
工程投运前3个月,运维单位应配备足够数量的仪器仪表、工器具、安全工器具、备品备件
农业高度兼业化、农村大量兼业农户的存在,虽然使经营规模难以扩大,但保证了农民收入
2017-23.根据《建设项目环境影响后评价管理办法(试行)》,()负责组织环
A.放疗十化疗 B.改良根治术 C.超根治术 D.乳癌根治术 E.姑息切
最新回复
(
0
)