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  • Hypotonic Solutions and Plant Cells: Understanding Cell Swelling
    When a plant cell like one from a peony stem is submerged in a very hypotonic solution, the following is likely to occur:

    * Water will move into the cell: A hypotonic solution has a lower solute concentration than the cell's cytoplasm. This creates a water potential gradient, driving water molecules to move from the area of high water potential (the hypotonic solution) to the area of low water potential (inside the cell).

    * The cell will swell: The influx of water will cause the cell to swell and increase in volume.

    * Turgor pressure will increase: The pressure exerted by the cell's contents against the cell wall will increase.

    * The cell wall will resist further expansion: The rigid cell wall of plant cells provides structural support and prevents the cell from bursting due to the increased internal pressure.

    However, there is a critical difference between animal and plant cells in this scenario:

    * Animal cells may burst: Animal cells lack a rigid cell wall. If placed in a hypotonic solution, they will continue to swell until they burst.

    * Plant cells maintain their shape: The cell wall prevents the plant cell from bursting. Instead, the cell will become turgid, which is a healthy state for most plant cells. This turgor pressure helps maintain the plant's structure and rigidity.

    In summary, a plant cell submerged in a hypotonic solution will likely experience:

    * Water influx: Water moves into the cell due to the water potential gradient.

    * Cell swelling: The cell increases in volume.

    * Increased turgor pressure: The cell's internal pressure increases.

    * Maintenance of cell shape: The rigid cell wall prevents the cell from bursting.

    This process is essential for plant growth and function, as it helps maintain cell shape and provides rigidity for the plant.

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