首页
登录
职称英语
The decrease in responsiveness that follows continuous stimulation (adaptation)
The decrease in responsiveness that follows continuous stimulation (adaptation)
游客
2024-01-10
5
管理
问题
The decrease in responsiveness that follows continuous stimulation (adaptation) is common to all sensory systems, including olfaction. With continued exposure to chronically present ambient odors, individuals’ perception of odor intensity is greatly reduced. Moreover, these perceptual changes can be profound and durable. It is commonly reported that following extended absences from the odorous environment, reexposure may still fail to elicit perception at the original intensity.
Most research on olfactory adaptation examines relatively transient changes in stimulus detection or perceived intensity—rarely exceeding several hours and often less—but because olfactory adaptation can be produced with relatively short exposures, these durations are sufficient for investigating many parameters of the phenomenon. However, exposures to odors in natural environments often occur over far longer periods, and the resulting adaptations may differ qualitatively from short-term olfactory adaptation. For example, studies show that even brief periods of odorant stimulation produce transient reductions in receptors in the olfactory epithelium, a process termed “receptor fatigue.” Prolonged odor stimulation, however, could produce more long-lasting reductions in response, possibly involving structures higher in the central nervous system pathway. [br] The author of the passage discusses “receptor fatigue” primarily in order to
选项
A、explain the physiological process through which long-lasting reductions in response are thought to be produced
B、provide an example of a process that subjects would probably not experience during a prolonged period of odorant stimulation
C、help illustrate how the information gathered from most olfactory research may not be sufficient to describe the effects of extended exposures to odors
D、show how studies of short-term olfactory adaptation have only accounted for the reductions in response that follow relatively brief absences from an odorous environment
E、qualify a statement about the severity and duration of the perceptual changes caused by exposure to chronically present ambient odors
答案
C
解析
B.provide an example of a process that subjects would probably not experience during a prolonged period of odorant stimulation提供一个过程的例子,这个过程是研究对象在长期气味刺激中不会经历的过程。
解析:根据本文,最后两句,长期刺激和短期刺激产生的结果虽然不同,但是要接受长期刺激,意味着必然已经接受了短期刺激,所以对于接受长期刺激的研究对象来说,先发生感受器疲劳,后影响中枢神经。B选项错误。
C.help illustrate how the information gathered from most olfactory research may not be sufficient to describe the effects of extended exposures to odors帮助证明大多数嗅觉研究所得到的信息,用于描述长期气味接触有可能不够
解析:本文通过提及“感受器疲劳”说明了短期刺激和长期刺激产生的结果不同,而根据第二段第一句,大多数的嗅觉研究,研究的是短期刺激。因此“感受器疲劳”可以证明大多数的嗅觉研究是不够的。C正确。
E.qualify a statement about the severity and duration of the perceptual changes caused by exposure to chronically present ambient odors限定了一个关于接触长期存在的环境气味所导致感官变化的强度和时间的观点
解析:本文提及“感受器疲劳”这个例子只是用来说明大多数人的研究时间是不够的,但并没有限制感官变化本身的时间和强度。E错误。
转载请注明原文地址:https://tihaiku.com/zcyy/3350737.html
相关试题推荐
WINK,Inc.followsacertainprocedurethatrequirestwotaskstobefinishedin
Ifthetemperaturedecreases30percentfrommdegreesto49degrees,thenm-49=
Ifthepriceoftheclothesdecreasesfrom$25to$20,whatisthepercentdecre
Aspeopleage,thenumberofcaloriestheyneedeachdaydecreaseswhiletheird
Anatomicalbilateralsymmetryisacommontrait.Itfollows,therefore,thatit
Thetreasurymarketdroppedinresponsetoadecreaseinthevalueofthedollar
11×13×17×19×23Adecreaseof1inwhichofthefactorsabovewouldresultinthe
Ifaisincreasedby25%andbisdecreasedby25%,theresultingnumberswillb
Ifanathletesweightdecreasedfrom160poundsto152pounds,whatwastheperc
Theinteriordimensionsofarectangulartankareasfollows:length110centime
随机试题
Acaffeinatedbeeisabusierbee.It’llworkhardertofindfood,andtoco
【评析】此时收敛区间由-1
曹女士,44岁。右上腹阵发性钻顶样剧烈绞痛6小时,伴恶心、呕吐。体格检查:体温3
有传染源存在时对其排除的病原体可能污染的环境和物品及时进行的消毒称为A.以上均非
此年份真题试卷网络收录,题目不全,仅供参考,后续会更新。 某初中物理教科书想想
黄芪配伍党参属于中药配伍中的A.相须B.相使C.相畏D.相恶E.相杀
明确和量化诊断二尖瓣狭窄的最可靠的方法是()。A.X线平片 B.心电图 C
商用房贷款审查和审批环节中的主要风险点不包括()。A.合同制作不合格 B
下列哪项不是结核性脑膜炎中期临床表现A、呕吐加重 B、脑膜刺激征 C、颅神经
在生产活动中,因生产过程及工作原因或其他相关的原因造成的伤亡事故称为()。A.职
最新回复
(
0
)