• Stewart M. Brooks


Solutions which have the same osmotic pressure as the plasma are isotonic. Those with a lower osmotic pressure are said to be hypotonic, and those with a higher osmotic pressure, hypertonic. (Only in isotonic solutions do cells retain their shape.) Tonicity depends upon the number of particles or osmols of solute; that is to say, solutions containing the same number of osmols are isotonic.


Sodium Chloride Osmol 

Copyright information

© Springer-Verlag Berlin Heidelberg 1968

Authors and Affiliations

  • Stewart M. Brooks
    • 1
    • 2
  1. 1.Lasell Junior CollegeAuburndaleUSA
  2. 2.Boston City Hospital School of NursingBostonUSA

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