Thirst is generally defined as a sensation of dryness in the mouth and throat associated with a desire for liquids. Yet many of us have very little knowledge of the fundamental mechanisms involved in thirst. Because if we do have a thorough understanding of what thirst is, we should know that this condition goes beyond merely having dry mouth and throat.
Compared to hunger, thirst is a far more discomforting sensation. While the sensation of hunger is characterized by intermittence, that of thirst is not. Rather, the sensation created by thirst is one that is continuous, becoming increasingly painful and unbearable until death.
In moderate thirst, the sensation seems confined within the back of the throat; an unpleasant feeling of prickling and mild burning is how this sensation can best be described. It is quite difficult, however, to be completely objective when describing true thirst; it is equally hard to separate the sensation itself from the desire for liquids.
There is a general propensity to associate thirst with the dryness in the mouth and throat. Along this line of thinking, the mechanism of thirst has been theorized, thus: When the water content of the blood and the tissues is diminished, the volume of the fluid secretions of the body - saliva included - is diminished as well. The mouth and throat become dry as a result of the decrease in the secretion of saliva. This sensation of dryness in the mouth and throat is what is commonly referred to as thirst.
This theory on the mechanism of thirst has a loophole though. True thirst is not produced by the mere dryness of the surface of the mouth and throat. This surface dryness may cause a craving for both the mouth and throat to be moistened. A person experiencing true thirst has the condition of water deficiency in the deeper tissues, not just this surface dryness. As an example, an animal deprived of its salivary glands drinks no more water and is thus, by reasonable assumption, no thirstier than a normal one whose salivary glands continuously supply the fluid necessary to keep its mouth and throat moist.
It appears in all probability that the significant water deficiency in causing the beginning of the thirst sensation is in the deeper tissues of the mouth and pharynx. All the body tissues, therefore, of an animal that is deprived of water become dehydrated. Obviously, the sensory nerves mainly in the throat area are effectively stimulated by this water deficiency, making this specific area act like the sense organ for thirst. [Read the Original Article]
Thirst Isn't Mere Dryness of Mouth and Throat
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Thanks for sharing the link, but unfortunately it seems to be down... Does anybody have a mirror or another source? Please answer to my post if you do!
I would appreciate if a staff member here at readingdotroom.blogspot.com could post it.
Thanks,
John
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Time of Beijing of sport net dispatch on December 21 evening, league matches of CBA of 2008-2009 sports season the 16th round spread out contention in the round, dongguan horse but gymnasium of city of Hangzhou of pineapple be a guest, the challenge is continuous the wide mansion of first adversary Zhejiang of the brigade of 4 guests field, final wide mansion with 105 win victory than 104 alarmingly dangerous.
Bosom of foreign aids of Zhejiang wide mansion is special 13 cent, gold establish 5 secondary attack of 56 minutes of 9 backboard, Zhang Nan roc 10 cent, Li Meng 10 minutes; Dongguan respect: Harris 44 minutes of 13 backboard, Qiu Biao 18 minutes of 4 backboard, Zhang Kai 2 secondary attack of 16 minutes of 10 backboard. Technical statistic
After first open a red-letter day, the basket on Harris quick attack hits the target unplug so that the head prepares, encounter Jun Kai to stop urgently instantly jump cast retaliate 2 minutes, zhang Kai is successive go up twice basket is hit into, dongguan horse but pineapple takes the lead in on field of race to control active, home team situation is critical, foreign aids bosom begins come out boldly especially, long shot of exterior line of planted agent breakthrough is omnipotent, first battle stops, wide mansion with 24 than 21 exceed Dongguan instead.
Zhang Kai of team of the 2nd Dongguan and Harris begin to enter state, rate team spreads out pursue and attack battle, play of team of wide nevertheless mansion is smooth, half of a game or contest ends, still with 50 than 48 banner dichotomy. The 3rd again battle, bosom spy periphery once more young tiger in 3 minutes, encounter Jun Kai 3 minutes the ball also scores a hit, the basket on Zhang Nan is procurable, wide mansion with one action with 79 than 68 pull open minute of difference. And with 79 than 69 enter minor details contention. Last section hind paragraph, harris notchs again and again, the with one action that lead a group exceeds instead. White again come out boldly is connected in two write down 3 minutes, two gangs warfare is become 102 than 104 hind, last moment bosom stops urgently especially jump cast 3 minutes to hit the target, wide mansion with 105 win victory than 104 alarmingly dangerous. (Li Nan)
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