Difference between revisions of "Irritation"
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==Origin== | ==Origin== | ||
[[Latin]] ''irrītāt''-, participial stem of ''irrītā-re'' to incite, [[excite]], provoke | [[Latin]] ''irrītāt''-, participial stem of ''irrītā-re'' to incite, [[excite]], provoke | ||
| − | *[ | + | *[https://en.wikipedia.org/wiki/15th_century 15th Century] |
==Definitions== | ==Definitions== | ||
*1: to provoke impatience, [[anger]], or displeasure in : annoy | *1: to provoke impatience, [[anger]], or displeasure in : annoy | ||
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| − | <center>For lessons on the related [[topic]] of '''''[[Conflict]]''''', follow [ | + | <center>For lessons on the related [[topic]] of '''''[[Conflict]]''''', follow [https://nordan.daynal.org/wiki/index.php?title=Category:Conflict '''''this link'''''].</center> |
==Description== | ==Description== | ||
| − | '''Irritation''' or ''exacerbation'', in [[biology]] and [ | + | '''Irritation''' or ''exacerbation'', in [[biology]] and [https://en.wikipedia.org/wiki/Physiology physiology], is a [[state]] of [https://en.wikipedia.org/wiki/Inflammation inflammation] or [[painful]] [[reaction]] to [https://en.wikipedia.org/wiki/Allergy allergy] or cell-lining damage. A [[stimulus]] or [[agent]] which induces the state of irritation is an irritant. Irritants are typically [[thought]] of as [[chemical]] agents but [[mechanical]], thermal ([[heat]]), and radiative [[stimuli]] can also be irritants. Irritation also has non-clinical usages referring to bothersome [[physical]] or [[psychological]] [[pain]] or discomfort. |
'' | '' | ||
Chronic irritation'' is a medical [[term]] [[signifying]] that afflictive [[health]] conditions have been present for a while. There are many disorders that can cause chronic irritation, the [[majority]] involves the skin, vagina, eyes and lungs. | Chronic irritation'' is a medical [[term]] [[signifying]] that afflictive [[health]] conditions have been present for a while. There are many disorders that can cause chronic irritation, the [[majority]] involves the skin, vagina, eyes and lungs. | ||
| − | In higher [[organisms]], an [ | + | In higher [[organisms]], an [https://en.wikipedia.org/wiki/Allergy allergic response] may be the cause of irritation. An allergen is defined distinctly from an irritant, however, as allergy requires a specific [[interaction]] with the [https://en.wikipedia.org/wiki/Immune_system immune system] and is thus dependent on the (possibly [[unique]]) [[sensitivity]] of the organism involved while an irritant, classically, [[acts]] in a non-specific [[manner]]. |
It is a [[form]] of [[stress]], but conversely, if one is stressed by unrelated matters, mild imperfections can cause more irritation than usual: one is irritable; see also [[sensitivity]]. | It is a [[form]] of [[stress]], but conversely, if one is stressed by unrelated matters, mild imperfections can cause more irritation than usual: one is irritable; see also [[sensitivity]]. | ||
| − | In more basic [[organisms]], assigning irritation the [[status]] of [[pain]] is the [[perception]] of the being [[stimulated]], which is not observable although it may be [[shared]] (see [ | + | In more basic [[organisms]], assigning irritation the [[status]] of [[pain]] is the [[perception]] of the being [[stimulated]], which is not observable although it may be [[shared]] (see [https://en.wikipedia.org/wiki/Pain#Gate_control gate control theory of pain]). |
| − | It is not proven that oysters can [[feel]] [[pain]], but it is known that they [[react]] to irritation. When an irritating [[object]] becomes trapped within an oyster's shell, it deposits layers of calcium carbonate (CaCO3), slowly increasing in size and producing a [ | + | It is not proven that oysters can [[feel]] [[pain]], but it is known that they [[react]] to irritation. When an irritating [[object]] becomes trapped within an oyster's shell, it deposits layers of calcium carbonate (CaCO3), slowly increasing in size and producing a [https://en.wikipedia.org/wiki/Pearl pearl]. This serves no reproductive [[purpose]] to the oyster, as pearls do not [[attract]] [[mates]] for the oyster. It is purely a [[defense]] [[mechanism]], to trap a potentially threatening irritant such as a [[parasite]] inside its shell, or an [[attack]] from outside, [[injuring]] the mantle tissue. The oyster creates a pearl sac to seal off the irritation. |
| − | It has also been [[observed]] that an [ | + | It has also been [[observed]] that an [https://en.wikipedia.org/wiki/Amoeba amoeba] avoids being prodded with a pin, but there is not enough [[evidence]] to suggest how much it [[feels]] this. Irritation is apparently the only [[universal]] sense shared by even single-celled [[creatures]]. |
| − | It is [[postulated]] that most such [[beings]] also [[feel]] [[pain]], but this is a [[projection]] – [[empathy]]. Some philosophers, notably [ | + | It is [[postulated]] that most such [[beings]] also [[feel]] [[pain]], but this is a [[projection]] – [[empathy]]. Some philosophers, notably [https://en.wikipedia.org/wiki/Ren%C3%A9_Descartes René Descartes], denied it entirely, even for such higher [[mammals]] as dogs or [https://en.wikipedia.org/wiki/Primate primates] like monkeys; Descartes considered [[intelligence]] a pre-requisite for the [[feeling]] of [[pain]].[https://en.wikipedia.org/wiki/Irritation] |
[[Category: Biology]] | [[Category: Biology]] | ||
Latest revision as of 01:39, 13 December 2020
Origin
Latin irrītāt-, participial stem of irrītā-re to incite, excite, provoke
Definitions
- 1: to provoke impatience, anger, or displeasure in : annoy
Description
Irritation or exacerbation, in biology and physiology, is a state of inflammation or painful reaction to allergy or cell-lining damage. A stimulus or agent which induces the state of irritation is an irritant. Irritants are typically thought of as chemical agents but mechanical, thermal (heat), and radiative stimuli can also be irritants. Irritation also has non-clinical usages referring to bothersome physical or psychological pain or discomfort. Chronic irritation is a medical term signifying that afflictive health conditions have been present for a while. There are many disorders that can cause chronic irritation, the majority involves the skin, vagina, eyes and lungs.
In higher organisms, an allergic response may be the cause of irritation. An allergen is defined distinctly from an irritant, however, as allergy requires a specific interaction with the immune system and is thus dependent on the (possibly unique) sensitivity of the organism involved while an irritant, classically, acts in a non-specific manner.
It is a form of stress, but conversely, if one is stressed by unrelated matters, mild imperfections can cause more irritation than usual: one is irritable; see also sensitivity.
In more basic organisms, assigning irritation the status of pain is the perception of the being stimulated, which is not observable although it may be shared (see gate control theory of pain).
It is not proven that oysters can feel pain, but it is known that they react to irritation. When an irritating object becomes trapped within an oyster's shell, it deposits layers of calcium carbonate (CaCO3), slowly increasing in size and producing a pearl. This serves no reproductive purpose to the oyster, as pearls do not attract mates for the oyster. It is purely a defense mechanism, to trap a potentially threatening irritant such as a parasite inside its shell, or an attack from outside, injuring the mantle tissue. The oyster creates a pearl sac to seal off the irritation.
It has also been observed that an amoeba avoids being prodded with a pin, but there is not enough evidence to suggest how much it feels this. Irritation is apparently the only universal sense shared by even single-celled creatures.
It is postulated that most such beings also feel pain, but this is a projection – empathy. Some philosophers, notably René Descartes, denied it entirely, even for such higher mammals as dogs or primates like monkeys; Descartes considered intelligence a pre-requisite for the feeling of pain.[1]
