tonicity


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Related to tonicity: hypertonic, osmotic pressure

tonicity

 [to-nis´ĭ-te]
the state of tissue tone or tension; in body fluid physiology, the effective osmotic pressure equivalent.

to·nic·i·ty

(tō-nis'i-tē),
1. A state of normal tension of the tissues by virtue of which the parts are kept in shape, alert, and ready to function in response to a suitable stimulus. In the case of muscle, it refers to a state of continuous activity or tension beyond that related to the physical properties; that is, it is active resistance to stretch; in skeletal muscle it is dependent upon the efferent innervation.
See also: isotonicity. Synonym(s): tonus
2. The osmotic pressure or tension of a solution, usually relative to that of blood.
See also: isotonicity.
[G. tonos, tone]

tonicity

(tō-nĭs′ĭ-tē)
n. pl. tonici·ties
1. Normal firmness or functional readiness in body tissues or organs.
2. The sustained partial contraction of resting or relaxed muscles.

to·nic·i·ty

(tō-nis'i-tē)
1. A state of normal tension of the tissues by virtue of which the parts are kept in shape, alert, and ready to function in response to a suitable stimulus. In the case of muscle, it refers to a state of continuous activity or tension beyond that related to the physical properties, i.e., its active resistance to stretch; in skeletal muscle, it is dependent on the efferent innervation.
Synonym(s): tonus.
2. The osmotic pressure or tension of a solution, usually relative to that of blood.
See also: isotonicity
[G. tonos, tone]

solution, hypertonic 

A solution with an osmotic pressure greater than that of an isotonic solution. Hypertonic ophthalmic solutions cause some stinging when instilled. Examples: sodium chloride 5%: when applied to an oedematous cornea this solution reduces oedema by drawing water from it; sulfacetamide sodium 30%; glycerol (or glycerin), at a dose of 1-1.5 g/kg body weight given as a solution with water or other liquid, which draws water from the eye into the blood and thereby reduces the intraocular pressure. Syn. hyperosmotic agent. See hyperosmotic agent; osmotic pressure; physiological saline.
hypotonic s. A solution with an osmotic pressure lower than that of an isotonic solution. Hypotonic ophthalmic solutions generally cause less irritation than hypertonic ones. See osmotic pressure.
isotonic s. A solution with an osmotic pressure equal to that on the other side of a semipermeable membrane. Example: sodium chloride 0.9% is considered to be approximately isotonic with the tears. See osmotic pressure; physio-logical saline.
References in periodicals archive ?
8 shows significant difference in terms of uterine tonicity in Group SI compared with Group NSI.
Decellularizing agent Concentration Tonicity DAPI Triton X-100 0.1% Hypo + Iso + Hyper + 0.25% Hypo + Iso + Hyper + 0.5% Hypo + Iso + Hyper + SDS 0.1% Hypo + Iso + Hyper + 0.25% Hypo + Iso + Hyper + 0.5% Hypo [+ or -] Iso - Hyper - Trypsin-EDTA 0.1% Hypo + Iso + Hyper + 0.25% Hypo - Iso + Hyper + 0.5% Hypo - Iso - Hyper - Table 3: Reverse transcript PCR primers.
Solutions with high osmolarity may worsen the diarrhea because the resulting increase in the intraluminal tonicity may cause hypersecretion of water and electrolytes; which is even more pronounced in animals with damaged intestinal villi (SMITH & BERCHTOLD, 2014).
satisfaction Abdominal Increase the Lying supine, inhale deeply breathing tonicity of the deep using abdominal muscles to transverse muscles expand the abdomen.
The reason being that its hypo tonicity causes rapid lysis of the cells and increases the inflammation on replantation.11 Furthermore, if the tooth is kept in dry storage medium before replantation maintenance of vitality of the cells is impossible.12
In several weeks, the uterus regains its normal tonicity, the suture is absorbed, and the anchor retained as seen in women undergoing conventional interval insertion.
found significant reduction rate of tonicity in trunk and upper limbs in patients receiving traditional Swedish massage.12
Rettig et al., "Erythrocyte adhesion is modified by alterations in cellular tonicity and volume," British Journal of Haematology, vol.
officinale possesses some important medicinal applications, which can maintain tonicity of stomach, promote the body fluid production, reduce peripheral vascular obstruction, and enhance the immune system.
The expression levels of 84 functional genes, which are involved in permeability, tonicity, angiogenesis, endothelial cell activation, and injury, in VECs of the small intestinal mesentery, were detected with a real-time quantitative PCR array.
It appears to act as a lubricant, and because it has the same tonicity, or concentration, of the tissue it does not affect the flow of electrolytes or water.
During phase 2 (dwell), the tonicity of the solution pulls wastes and excess fluid from the capillary blood through the lining of the semi-permeable peritoneal membrane into the dialysate (Headley, 2014; Krediet, 2013; Saxena, 2014).