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C13Diffusion&Osmosis
Diffusion&Osmosis
Question | Answer |
---|---|
What does permeable mean | A membrane is said to be permeable to a substance if substances can pass through it |
What does impermeable mean | Substances cannot pass through it |
What does diffusion mean | The spreading out of molecules from a region of high concentration to a region of low concentration |
What is a solvent | A solvent is a liquid that dissolves other substances eg water |
What is a solute | A solute is a substance that has been dissolved eg salt dissolved in water |
What is a solution | A solution is a mixture of a solute and a solvent eg salt water |
What is osmosis | Osmosis is the movement of water molecules across a selectively permeable membrane from a region of high water concentration to a region of low water concentration |
What is aoemba | Aoemba is a single celled organism that lives in fresh water pools and ponds |
What is turgor/turgid pressure | The pressure of the cytoplasm and vacuole against the cell wall of the plant |
What is plasmolysis | The loss of water from the cytoplasm and the movement of the cell membrane away from the cell wall |