Question

Explain why plant cells do not "diminish" in overall size when they lose water.

Answer 1

If a plant cell is placed in a hypertonic solution, the plant cell loses water and hence turgor pressure by plasmolysis: pressure decreases to the point where the protoplasm of the cell peels away from the cell wall, leaving gaps between the cell wall and the membrane and making the plant cell shrink and crumple.

Answer 2

The structure of the plant cell is composed of an additional layer of the cell wall as compared to the animal cell that contains only cell membrane.

• The cell wall provides rigidity to the cell of the plant and provides the cell to maintain its shape in every condition.

• Thus, when plant cells lose water when their extracellular fluid becomes hypertonic, the cell wall allows the cells to maintain their shape and size.
• However, the cell membrane detaches from the cell membrane and the cytoplasm constricts.

Thus, the cell wall prevents the overall size of the cell from shrinking.

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