isotonicity - определение. Что такое isotonicity
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Что (кто) такое isotonicity - определение

CHEMICAL QUALITY
Hypotonic; Hypertonic; Hypertonic solution; Hypotonic solution; Isotonicity; Hyptonicity; Hypertonicity; Hyperosmotic; Hypoosmotic; Hypotonicity; Isotonic solutions; Tonacity; Isotonic fluid; Osmotic agent; Hypotonic solutions; Low tonicity
  • A [[red blood cell]] in a hypertonic solution, causing water to move out of the cell.
  • A [[red blood cell]] in a hypotonic solution, causing water to move into the cell.
  • Depiction of a [[red blood cell]] in an isotonic solution.
  • Micrographs of osmotic pressure on red blood cells
  • Effect of different solutions on red blood cells

tonicity         
[t?(?)'n?s?ti]
¦ noun
1. muscle tone.
2. Linguistics the pattern of tones or stress in speech.
3. Biology osmotic pressure.
hypotonic         
[?h??p?(?)'t?n?k]
¦ adjective
1. Biology having a lower osmotic pressure than a particular fluid.
2. Physiology of or in a state of abnormally low muscle tone.
Derivatives
hypotonia noun
hypotonicity noun
Tonicity         
·noun The state of healthy tension or partial contraction of muscle fibers while at rest; tone; tonus.

Википедия

Tonicity

In chemical biology, tonicity is a measure of the effective osmotic pressure gradient; the water potential of two solutions separated by a partially-permeable cell membrane. Tonicity depends on the relative concentration of selective membrane-impermeable solutes across a cell membrane which determine the direction and extent of osmotic flux. It is commonly used when describing the swelling-versus-shrinking response of cells immersed in an external solution.

Unlike osmotic pressure, tonicity is influenced only by solutes that cannot cross the membrane, as only these exert an effective osmotic pressure. Solutes able to freely cross the membrane do not affect tonicity because they will always equilibrate with equal concentrations on both sides of the membrane without net solvent movement. It is also a factor affecting imbibition.

There are three classifications of tonicity that one solution can have relative to another: hypertonic, hypotonic, and isotonic. A hypotonic solution example is distilled water.