isotonic

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isotonic

 [i″so-ton´ik]
1. of equal tension.
2. denoting a solution in which body cells can be bathed without net flow of water across the semipermeable cell membrane; also, denoting a solution having the same tonicity as another solution with which it is compared.

i·so·ton·ic

(ī'sō-ton'ik),
1. Relating to isotonicity or isotonia.
2. Having equal tension; denoting solutions possessing the same osmotic pressure; more specifically, limited to solutions in which cells neither swell nor shrink. Thus, a solution that is isosmotic with intracellular fluid will not be isotonic if it includes solute, such as urea, that freely permeates cell membranes.
3. In physiology, denoting the condition when a contracting muscle shortens against a constant load, as when lifting a weight. Compare: auxotonic, isometric (2).

isotonic

/iso·ton·ic/ (-ton´ik)
1. denoting a solution in which body cells can be bathed without net flow of water across the semipermeable cell membrane.
2. denoting a solution having the same tonicity as another solution with which it is compared.
3. maintaining uniform tonus.

isotonic

(ī′sə-tŏn′ĭk)
adj.
1. Of equal tension.
2. Isosmotic.
3. Having the same concentration of solutes as the blood: an isotonic saline solution.
4. Physiology Of or involving muscular contraction in which the muscle remains under relatively constant tension while its length changes.

i′so·ton′i·cal·ly adv.
i′so·to·nic′i·ty (-tə-nĭs′ĭ-tē) n.

isotonic

[ī′səton′ik]
Etymology: Gk, isos + tonikos, stretching
pertaining to a solution that causes no change in cell volume.

isotonic

Physiology
adjective Referring to uniformity of osmotic pressure.
 
Sports medicine
adjective Referring to a uniform muscle tone.
 
noun Isotonic drink, see there.

isotonic

adjective
1. Referring to a uniform muscle tone.
2. Referring to uniformity of osmotic pressure noun Isotonic drink, see there.

i·so·ton·ic

(ī'sō-ton'ik)
1. Relating to isotonicity or isotonia.
2. Having equal tension; denoting solutions possessing the same osmotic pressure; more specifically, limited to solutions in which cells neither swell nor shrink. Thus, a solution that is isosmotic with intracellular fluid will not be isotonic if it includes solute, such as urea, which freely permeates cell membranes.
3. physiology Denoting the condition when a contracting muscle shortens against a constant load, as when lifting a weight.
Compare: auxotonic, isometric (2)

isotonic

Of a fluid that exerts the same OSMOTIC PRESSURE as another, especially as that of the body fluids. Body cells, such as red blood cells, can be immersed in an isotonic solution without being caused to change shape. ‘Normal’ saline is isotonic with blood.

isotonic

(of a liquid) having a fluid state with the same WATER POTENTIAL as another liquid. See HYPOTONIC and Fig. 193 .

isotonic

same osmotic pressure as body fluids

isotonic (īˈ·sō·tˑ·nik),

n muscle contraction that involves change in the muscle length.

i·so·ton·ic

(ī'sō-ton'ik)
1. Relating to isotonicity or isotonia.
2. Having equal tension; denoting solutions possessing the same osmotic pressure.
3. In physiology, denoting the condition when a contracting muscle shortens against a constant load.

isotonic (ī´sōton´ik),

adj equivalence in osmotic pressure. Specifically used in reference to a solution whose osmotic pressure is equal to that of a body fluid, such as blood plasma or tears, to which the solution is compared.
isotonic muscle contraction,

isotonic

1. of equal tension.
2. denoting a solution in which body cells can be bathed without net flow of water across the semipermeable cell membrane; also, denoting a solution having the same tonicity as another solution with which it is compared.

isotonic contraction
muscle contraction without appreciable change in the force of contraction; the distance between the muscle's origin and insertion becomes lessened.
isotonic dehydration
occurs when the fluid lost is isotonic with serum, as in sweating, simple enteritis, nephrosis. There are therefore no errors of electrolyte balance likely to result.
isotonic saline
see normal saline.
References in periodicals archive ?
SPINS' latest data indicate that the total functional beverage market, including isotonics, lifestyle/wellness drinks, meal replacements and medicinal teas, grew 18% over the last year and is currently posting total sales of $1.
Tuff Guyz Corporation, Park City, UT, has launched a premium line of vitamin fortified isotonic beverages called Tuff Guyz Sports Drink.
This type of product builds on PepsiCo's strong leadership positions in water, isotonics and tea," says chief executive officer John Compton.
Both 100% juice products and juice-based drinks show steady sales throughout the year, while the isotonics (sports drinks) segment is highly seasonal and peaks during the summer months.
Other fast growing markets include secular growth segments like bottled waters and isotonics, as well as markets such as juices and milks where plastic screw caps have been adapted to paperboard packaging in the 1990s.
The tropical fruit beverage market has seen considerable product diversification in the past decade, with introduction of several new juice drinks, no-juice drinks, teas, isotonics and alcohol-based drinks.
These innovative new products give our unparalleled portfolio even greater strength, and build on PepsiCo's strong leadership positions in water, isotonics and tea," states PepsiCo North America chief executive officer John Compton.
Regardless of what people want to eat, whether it's protein bars or potato chips, isotonics or ice-cold beer, we're ready," comments Steve Keane, the chain's product director for groceries and snacks.
Based in Sao Paulo state, Casadoce is a leading Brazilian producer of powdered drinks, isotonics and powdered desserts, with 200 employees, a national footprint and approximately R$100 million in annual revenue.
Quaker Oats is positioning Propel Fitness Water in the water category, rather than the isotonic or sports drink category, though the product is identified as "from the makers of Gatorade.