Test your knowledge of extracellular osmolarity and cell volume by matching the

Question

Test your knowledge of extracellular osmolarity and cell volume by matching the correct set of characteristics with each hypothetical situation. For each of the three scenarios, assume that a cell is initially floating in a 1-liter flask full of ECF, and it is in osmotic equilibrium at 300 mOsm. The osmolarity of the ECF increases. The volume of the CF increases. The osmolarity of the ICF decreases. If you take the cell and transfer it into a different 1-liter flask full of ECF that contains 200 mOsm of If you adda nonpenetrating solute to the solution in the flask, what happens at equilibrium? If you add a membrane-penetrating solute to the solution in the flask, what happens at equilibrium? nonpenetrating solutes, what happens at equilibrium? The osmolarity of the ECF increases. The volume of the ICF does not change. The osmolarity of the ICF increases. The osmolarity of the ECF increases. The volume of the CF decreases. The osmolarity of the ICF increases. The osmolarity of the ECF increases The volume of the ICF does not change. The osmolarity of the ICF increases. The osmolarity of the ECF increases The volume of the CF increases. The osmolarity of the ICF decreases The osmolarity of the ECF increases. The volume of the CF decreases. The osmolarity of the ICF increases.

Explanation / Answer

1. the solvent moves from ICF to ECF that is why the volume of ICF is decreased and the osmolarity is increased.

2.Due to equilibrium conditions the solute and solvent concentration at both side almost equals.

3. The volume is increased due to addition of the volume of solvent and concentration is decreased.

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