Diffusion and Osmosis True or False

Osmosis and Turgor Pressure

• Osmosis is the movement of water molecules across a semipermeable membrane from an area of higher water concentration to an area of lower water concentration.
• Turgor pressure is the pressure exerted by the cytoplasm and vacuole against the cell wall of a plant.
• Wilting occurs when plant cells lose turgor due to water loss through osmosis.
• High sugar concentrations in food preservation kill microorganisms by removing water through osmosis, preventing reinfection.
• Salting fish and beef also uses osmosis to remove water from microorganisms, resulting in their death.
• In an osmosis experiment, tying knots at the ends of visking tubing prevents leakage of solutions.
• In an osmosis experiment, the control group is the tube containing distilled water.
• When a visking tubing containing concentrated sucrose solution is suspended in distilled water, its mass increases because water moves into the solution through osmosis.
• Replicating osmosis experiments or cross-referencing results with other groups helps validate the findings.
• The increase in turgidity of a visking tubing containing concentrated glucose solution demonstrates osmosis.

Diffusion

• Diffusion is the movement of molecules from a region of high concentration to a region of low concentration.
• Diffusion is a passive process, meaning it does not require energy.
• Temperature, concentration difference, and distance all influence the rate of diffusion.
• Transpiration of water vapor through stomata of a leaf is an example of diffusion.
• The mass of a substance does not affect the rate of diffusion.
• A plant cell is considered turgid when no more water can enter the cell by osmosis, meaning the inward pressure of water equals the resistance of the cell wall.