首页
登录
职称英语
Australian researchers have discovered electroreceptors(sensory organs desig
Australian researchers have discovered electroreceptors(sensory organs desig
游客
2025-02-26
9
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 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 electrical field strengths about 1, 000 times greater than those known to excite electro-receptors.
Having discovered the electroreceptors, researchers are now investigating how anteaters utilize such a sophisticated sensory system. In one behavioral experiment, researchers 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, re- searchers 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 to locate unseen prey suggests, according to the researchers, that the anteaters were using their electrorecep- tors to locate the nesting chambers. [br] According to the passage, which of the following is a characteristic that distinguishes electroreceptors from tactile receptors?
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
电接收器和触觉接收器的不同体现在:A.对电刺激反应方式。B.成群分布。C.不寻常位置。E.传送神经活动的数量。上述四点原文均未提。D.正确。引起兴奋的电刺激量。原文L13—17,触觉接收器起反应的电场强度比电接收器要高1000倍。
转载请注明原文地址:https://tihaiku.com/zcyy/3973853.html
相关试题推荐
Australianresearchershavediscoveredelectroreceptors(sensoryorgansdesig
Australianresearchershavediscoveredelectroreceptors(sensoryorgansdesig
Australianresearchershavediscoveredelectroreceptors(sensoryorgansdesig
Australianresearchershavediscoveredelectroreceptors(sensoryorgansdesig
TwosuitsofbattlearmorwornbyKingHenryVIIIwerediscovered,onefromthe
Researchershavefoundthatwhenveryoverweightpeople,whotendtohaverelati
Aresearcherdiscoveredthatpeoplewhohavelowlevelsofimmune-systemactivit
Agroupofscientistsstudyingcalciummetabolisminlaboratoryratsdiscovered
Peoplehavediscoveredtheprinciplesofsolarenergywheneverfuelbecomesscar
Researchershavequestionedtheuseofcostlyandexperimentaldiagnostictestt
随机试题
Helikesfinding______withothers,whichmakesthemveryangry.A、errorsB、shortc
A.continuallyB.wastedC.atthetopD.meansE.causesF.everything
砖基础防潮层位置宜在室内地面标高以下()。A.半皮砖 B.一皮砖 C.二皮
关于急性出血性坏死性小肠炎的临床特点,下列错误的是A.空肠或回肠广泛出血及坏死为
在青少年时期,摄入脂肪时应注意脂肪中饱和脂肪酸、单不饱和脂肪酸和多不饱和脂肪酸的
改革开放是党在新的时代条件下带领人民进行的新的伟大的革命,目的就是要(??)A.
建设工程施工许可证的申请主体是该工程的()。A、施工单位 B、建设单位 C、
教师的领导方式可分为()。 A.集权型B.开放型 C.民主型D.封闭型
患某,女,44岁,反复出现胃脘疼痛,呕吐酸水。今天吃了山楂片后出现胃脘疼痛明显,
老年男性患者,近2月来感头晕乏力,心悸不适来院检查,查体:贫血貌,皮肤干燥,指甲
最新回复
(
0
)