When soaked in a hypertonic solution, water will move ____ potato cells.

Question

BlackTom AI · Accepted Answer

This question asks about the direction of water movement when potato cells are placed in a hypertonic solution.
Option 1: "in and out in equal amounts of". This would imply no net movement of water, which only occurs if the external solution is isotonic (same solute concentration as the cell contents). In a hypertonic solution, the external solute concentration is higher, so water moves out rather than staying balanced.
Option 2: "into". If water moved into the potato cells, that would require the external environment to be hypotonic relative to the cell interior. A hypertonic external solution pulls water out, not in, so this option describes the opposite situation.
Option 3: "out of". In a hypertonic solution, the outside has a higher solute concentration than inside the potato cells. Water moves from a region of lower solute concentration (inside the cell) to higher solute concentration (outside), leading to water exiting the cells. This is the expected net movement.

The core concept here is osmosis: water moves toward higher solute concentration. Since the external solution is hypertonic, water leaves the potato cells, causing plasmolysis in plant cells if the conditions are extreme. The provided correct answer aligns with this principle, indicating water moves out of the potato cells in a hypertonic solution.

When soaked in a hypertonic solution, water will move ____ potato cells.

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