perspiration

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perspiration:

see sweatsweat
or perspiration,
fluid secreted by the sweat glands of mammalian skin and containing water, salts, and waste products of body metabolism such as urea. The dissolved solid content of sweat is only one eighth that of an equal volume of urine, the body's main
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.

Perspiration

 

sweating, the formation of sweat and its excretion by the sweat glands onto the surface of the skin.

Perspiration is well manifested in man, higher and lower apes, and ungulates (mainly perissodactyls). In rodents, insectivores, bats, terrestrial predators, and lower mammals (duck-billed platypus and echidna) it is almost nonexistent. In man perspiration is continuous. It is performed principally by reflex action—reflex receptors are located in the skin, mucosa, and muscles. Adequate stimuli for the perspiration reflex are high air temperature, ingestion of hot or pungent food or large quantities of fluids, physical exertion, fever, and emotional states. Perspiration centers are located in the cerebral cortex, hypothalamus, medulla oblongta, and spinal cord. Perspiration may be increased or decreased by means of medicinal preparations. It depends on blood circulation in the skin: when the blood vessels are dilated it increases; when they are constricted it decreases. It is an adaptation of the body to temperatures over 33°C. Perspiration is involved in thermoregulation and in maintenance of the water and salt balances of the body. Perspiration is important as an excretory function, especially with diseases of the kidneys.

Perspiration disorders may be quantitative (general or local) or qualitative. Quantitative disorders are more frequent and are expressed as increase (hyperhidrosis), decrease (hypohidrosis), or absence (anhidrosis) of perspiration. General hyperhidrosis occurs with various infections, intoxications, functional disturbances of the endocrine glands (hyperthyroidism), and other diseases. Increased perspiration may also be produced by the severe emotional excitement of fear or pain, in which case on pale, cold skin a “cold sweat” appears. Local perspiration disorders arise with many skin diseases, such as eczema, psoriasis, and shingles. Hypohidroses and anhidroses are observed in the region of scars after burns and wounds, as well as in leprosy and certain vascular diseases. Disorders of perspiration arise most often when there is disease of various sections of the nervous system, such as expressed hyperhidrosis of the hands and feet, which occurs in neuroses.

Qualitative perspiration disorders are manifested by changes in composition and color of excreted sweat. Thus, the sweat may sometimes be fatty because of admixture with the secretions of the sebaceous glands in seborrhea. With diabetes mellitus it may contain increased sugar. With uremia, increased amounts of urea and uric acid are noted. Treatment is directed toward the basic disease. Local symptomatic agents are also used.

perspiration

[‚pər·spə′rā·shən]
(physiology)
The secretion of sweat.
(chemistry)

perspiration

1. the act or process of insensibly eliminating fluid through the pores of the skin, which evaporates immediately
2. the sensible elimination of fluid through the pores of the skin, which is visible as droplets on the skin
3. the salty fluid secreted through the pores of the skin; sweat
References in periodicals archive ?
It perspires, which cools the skin through evaporation, and it increases blood circulation to the skin surface, which helps transfer heat to the cooler atmosphere.
In hot weather, or during vigorous activity, the body perspires.
You may lose weight despite an increasing appetite, perspire excessively and have more frequent bowel movements.
I even perspire two minutes after having a cold shower.
it's the time of year when horses sweat, men perspire and ladies merely glow.
Men and women perspire equally on first dates, admit 43%.
Hardwearing deck shoes are the ultimate summer footwear - light and leathery, allowing your feet room to breathe, perspire and even expand a little on hot days.
A study at the University of South Carolina (Davis) revealed that players ranging from 200 to 300 pounds (the weight range of the majority of collegiate football players) perspire the most.
The cooler it is, the less water evaporates, the less we perspire, and the less the plants transpire.
t0224jamborafitnessfind_feat2_1Instead of buying, for example, expensive knee supports that will eventually slip off when you begin to perspire, why not try taping them?