Type of Solutes Non-permeable Permeable Solution A 300 0 Solution B 295 20 Solution C 270 30 A cell with an internal osmolarity of 295 mOsm/L (non-permeable solutes) is placed in solution A. Solution A has an effective osmolarity that is ____________ compared to the cell; after water movement has reached a steady state, the cell volume will be ___________. A) hypertonic; decreased B) hypotonic; increased C) isotonic; decreased D) hypertonic; increased A cell with an internal osmolarity of 295 mOsm/L (non-permeable solutes) is placed in solution B. Solution B has an effective osmolarity that is ____________ compared to the cell; after water movement has reached a steady state, the cell volume will be ___________. A) hypotonic; decreased B) hypertonic; decreased C) hypotonic; increased D) isotonic; unchanged A cell with an internal osmolarity of 295 mOsm/L (non-permeable solutes) is placed in solution C. Solution C has an effective osmolarity that is ____________ compared to the cell; after water movement has reached a steady state, the cell volume will be ___________. A) hypotonic; decreased B) hypertonic; increased C) hypotonic; increased D) isotonic; unchanged
Type of Solutes Non-permeable Permeable
Solution A
300 0
Solution B
295 20
Solution C
270 30
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A cell with an internal osmolarity of 295 mOsm/L (non-permeable solutes) is placed in solution A. Solution A has an effective osmolarity that is ____________ compared to the cell; after water movement has reached a steady state, the cell volume will be ___________.
A) hypertonic; decreased B) hypotonic; increased C) isotonic; decreased D) hypertonic; increased
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A cell with an internal osmolarity of 295 mOsm/L (non-permeable solutes) is placed in solution B. Solution B has an effective osmolarity that is ____________ compared to the cell; after water movement has reached a steady state, the cell volume will be ___________.
A) hypotonic; decreased B) hypertonic; decreased C) hypotonic; increased D) isotonic; unchanged
-
A cell with an internal osmolarity of 295 mOsm/L (non-permeable solutes) is placed in solution C. Solution C has an effective osmolarity that is ____________ compared to the cell; after water movement has reached a steady state, the cell volume will be ___________.
A) hypotonic; decreased B) hypertonic; increased C) hypotonic; increased D) isotonic; unchanged
Osmosis : Movement of solvent molecules or water molecules from a region of low concentration or higher water potential to a region of high concentration or low water potential across a semi-permeable membrane is called as osmosis.
Osmolarity : It represents the concentration of solute molecules in the solution.
Effective osmolarity: In a solution there may be two types of solutes which are permeable or non-permeable through a semi-permeable membrane depending upon the size of molecules as larger one could not pass through the pores of membrane while smaller molecules can pass through these pores.
The non-permeable molecules contribute in the osmolarity of the solution thus the difference between osmolarity of permeable and non-permeable molecules is effective osmolarity of the solution.
Effective osmolarity of solution = osmolarity of non-permeable molecules - osmolarity of permeable molecules
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