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An Investigation into the Factors which Affect Osmosis Osmosis is defined as the movement of water molecules from a higher concentration to a lower concentration through a partially permable membrane. Osmosis occurs with molecule moving in and out, these molecules move across the plant's cell membrane. The plant's cell membrane is partially permable and therefore it has small holes in it which allow for small water molecules to pass through it however larger molecules such as glucose through. The diagram below represents this: However on the out side of the plant cells there is a cell wall of cellulose that has larger holes that let anything pass through it. This cell wall is totally permeable and therefore will allow larger molecules such as glucose through it, but the larger molecules can still not pass the cell membrane. When these cells are in a solution which has a higher concentration of water than...

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