A cell is placed in an isotonic solution. The movement of water across the plasma membrane would ResponsesA not occur.not occur.B be faster into the cell than out of the cell.be faster into the cell than out of the cell.C be faster out of the cell than into the cell.be faster out of the cell than into the cell.D occur at the same rate into and out of the cell.
Question
A cell is placed in an isotonic solution. The movement of water across the plasma membrane would ResponsesA not occur.not occur.B be faster into the cell than out of the cell.be faster into the cell than out of the cell.C be faster out of the cell than into the cell.be faster out of the cell than into the cell.D occur at the same rate into and out of the cell.
Solution
The answer is D. In an isotonic solution, the concentration of solutes outside the cell is the same as the concentration inside the cell. Therefore, water will move across the plasma membrane at the same rate in both directions, maintaining equilibrium.
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