The Decrease in Responsiveness That Follows Continuous Stimulation Gre
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Verbal Expert
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The decrease in responsiveness that follows continuous stimu [#permalink] 
Updated on: 23 Jan 2021, 03:36
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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.
According to the passage, the phenomenon of olfactory adaptation may cause individuals who are reexposed to an odorous environment after an extended absence to
A. experience a heightened perception of the odor
B. perceive the odor as being less intense than it was upon first exposure
C. return to their original level of perception of the odor
D. exhibit a decreased tolerance for the odorous environment
E. experience the phenomenon of adaptation in other sensory systems
The passage asserts which of the following about the exposures involved in the "research on olfactory adaptation" ?
A. The exposures are of long enough duration for researchers to investigate many aspects of olfactory adaptation.
B. The exposures have rarely consisted of reexposures following extended absences from the odorous environment.
C. The exposures are intended to reproduce the relatively transient olfactory changes typical of exposures to odors in natural environments.
D. Those exposures of relatively short duration are often insufficient to produce the phenomenon of receptor fatigue in study subjects.
E. Those exposures lasting several hours produce reductions in receptors in the olfactory epithelium that are similar to the reductions caused by prolonged odor stimulation.
The author of the passage discusses "receptor fatigue" primarily in order to
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
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Originally posted by Carcass on 19 Nov 2017, 01:24.
Last edited by Carcass on 23 Jan 2021, 03:36, edited 1 time in total.
Formatted
Verbal Expert
Joined: 18 Apr 2015
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Re: The decrease in responsiveness that follows continuous stimu [#permalink] 24 Aug 2019, 11:31
A question like this is akin inference question.
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.
It is to show no conclusive results. For this is C.
Tough question.
Ask if something is still unclear to you.
Regards
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Re: The decrease in responsiveness that follows continuous stimu [#permalink] 19 Oct 2018, 09:41
Kindly explain Q2.I did not get why Its answer is "A. The exposures are of long enough duration for researchers to investigate many aspects of olfactory adaptation.".
In passage "research on olfactory adaptation" they are talking about short exposures.
Manager
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Re: The decrease in responsiveness that follows continuous stimu [#permalink] 19 Oct 2018, 09:56
The Answer for Q2 has to be A , as we can easily infer & understand from the passage that these exposures for Olfactory Research are FAR FROM the odor / odorous stimulation of Natural Environment which generally lasts for few hours & more intensity .
So REJECT option C & E.
Now we can very easily Corroborate Option D in the following lines , which guarantees that Olfactory Adaption methodology allows for RECEPTOR Fatigue
REJECT Option B as there is no mention of Re-exposure in their methodology .
Hope that is Clear
Intern
Joined: 06 Aug 2019
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Re: The decrease in responsiveness that follows continuous stimu [#permalink] 24 Aug 2019, 00:44
Could you please explain Q.3??
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Re: The decrease in responsiveness that follows continuous stimu [#permalink] 27 Aug 2019, 10:36
Thanks a lot.. It was really helpful..
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Re: The decrease in responsiveness that follows continuous stimu [#permalink] 03 Sep 2019, 18:59
Carcass wrote:
A question like this is akin inference question.
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.
It is to show no conclusive results. For this is C.
Tough question.
Ask if something is still unclear to you.
Regards
why its not conclusive . It clearly says that brief simulation results into _transient_ "receptor fatigue" and prolonged simulation affects are long lasting reduction.
Verbal Expert
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Re: The decrease in responsiveness that follows continuous stimu [#permalink] 04 Sep 2019, 02:49
however , could produce more long-lasting reductions in response, possibly involving structures higher
The two words above are clear signals that we do not know DEFINITELY the answer
Regards
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Re: The decrease in responsiveness that follows continuous stimu [#permalink] 21 Feb 2021, 23:59
can someone explain why d is wrong for q3?
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The decrease in responsiveness that follows continuous stimu [#permalink] 22 Feb 2021, 01:45
IAmConfused wrote:
can someone explain why d is wrong for q3?
D is too extreme and goes beyond the scope of the passage.
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.
Passage didn't suggested any such thing, the word only make it too strong and apart from that, see the relevant text in the passage:
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.
D is out of scope.
Thank you
Manager
Joined: 23 May 2021
Posts: 146
Re: The decrease in responsiveness that follows continuous stimu [#permalink] 26 Aug 2021, 00:34
Why isn't Q2 answer D - i considered this statement 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. and chose D as my ans 
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Re: The decrease in responsiveness that follows continuous stimu [#permalink] 16 Oct 2022, 08:59
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