perspiration


Also found in: Dictionary, Thesaurus, Medical, Financial, Idioms, Wikipedia.
Related to perspiration: insensible perspiration

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
..... Click the link for more information.
.

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 ?
To elucidate the dyeing performance further, the color parameters and the fastness properties (wash, light, alkaline perspiration and rubbing) of pre and post-washed (using a nonionic detergent at 50AdegC) dyed fabric, were explored using Datacolor spectrophotometer SF600.
The gel helps in eliminating feet perspiration and the resulting unpleasant odor.
Because of congener toxicokinetic differences, we investigated elimination of five common PBDE congeners (28, 47, 99, 100, and 153) in three body fluids: blood, urine, and perspiration. For each body fluid, an isotope dilution method was used to determine levels of each congener.
An alternative approach is to expel perspiration from the prosthesis as it accumulates.
The upright cup test is used to test microporous hydrophobic coatings and laminates and measures water or perspiration vapor transmission.
Once the user places the headset near their ears, the integrated sensor can track the perspiration, heart rate and temperature data.
I've learned this task isn't just going to be about inspiration and perspiration - it's about dogged mental strength.
Wearing natural fibres, such as cotton, will take perspiration away from your skin and help disperse odours, while using antiperspirant deodorant can work miracles.
I got on to Johnson Cleaners who told me: "Unfortunately marks have remained on the dress due to perspiration on the fabric, rather than negligence on our part.
We like Boots Expert Ultra Dry Anti-Perspirant Sport, pounds 1.99, which is a hard-working, quick-drying, alcohol-free aerosol that tackles even problem perspiration, seeing offdamp patches and keeping you fresh for up to 48 hours.
The company's patented MT (Moisture Transfer) technology is the reason for all this--it solves the perspiration problem that leads to wet feet, cold or hot.
Symptoms are better for open fresh air, rest, perspiration and movement.