Dictionary » I » Isosmotic




(1) (used of solutions) Of or having the same or equal osmotic pressure.

(2) A condition in which the total number of solutes (i.e. permeable and impermeable) in a solution is the same or equal to the total solutes in another solution.


Word origin: G. isos, equal + osmotic: relating to osmosis.
Related forms: isosmotically (adverb).
Related phrases: isosmotic solution.

Alternative forms: isoosmotic, iso-osmotic.
Compare: hyposmotic, hyperosmotic.
See also: osmosis, osmotic pressure.

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Re: Urea and membrane permeability of RBC

... than, say, glucose (MW of 180) which requires some form of facilitative transport to get across a cell membrane. 1.8% urea (ca. 0.3M urea) is isosmotic with plasma (as is 0.9% NaCl, or 5% glucose). A 0.28M solution of urea must be just hypotonic enough for water to flow into and lyse the RBCs. ...

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by blcr11
Mon Aug 18, 2008 6:07 pm
Forum: Cell Biology
Topic: Urea and membrane permeability of RBC
Replies: 2
Views: 44846

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