Multiple Choice Question An investigation is set up to study the movement of water through a membrane. The results are shown in the diagram. Based on these results, which statement correctly predicts what will happen to red blood cells when they are placed in a beaker containing a saltwater solution that has a salt concentration much higher than that of the red blood cells? A. The red blood cells will lose water and decrease in size. B. The red blood cells will absorb water and increase in size. C. The red blood cells will first absorb water, then lose water. D. The red blood cells will first lose water, then absorb water.
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The correct answer is A. The red blood cells will lose water and decrease in size.
When red blood cells are placed in a saltwater solution with a higher salt concentration than that of the cells, the water inside the cells will move out into the saltwater solution in an attempt to balance the concentration of solutes on both sides of the membrane. As a result, the red blood cells will lose water and shrink in size.
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