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Isotonic
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The concentration of solute in the solution can be equal to the concentration of solute in the cells. The cell is in an isotonic solution. (iso = same as normal) (Biological definition)
- For Isotonic muscle exercise, see Isometric exercise and Weight training.
- For the term associated with muscle contraction, see isotonic (exercise physiology)
- For the term in nuclear physics, see isotone
Isotonic literally translates to equal tension. The term is used in several different contexts.
Isotonic solutions involve no net movement of molecules across non-perfect biological membranes. Solutions remaining in osmotic equilibrium with respect to a particular biological membrane are said to be isotonic. This is different to iso-osmotic solutions which involve no net movement of molecules when separated by a perfect semi-permeable membrane.
A solution that has the same salt concentration as the normal cells of the body and the blood. As opposed to a hypertonic solution or a hypotonic solution. An isotonic beverage may be drunk to replace the fluid and minerals which the body uses during physical activity.