Diffusion and Osmosis

What is a semi-permeable membrane?

• A barrier that allows all molecules to pass through without restriction.

• A barrier that allows certain molecules to pass through while blocking others.

• A solid wall that prevents any molecules from passing through.

• A flexible membrane that can change its permeability based on temperature.

What is diffusion?

• Diffusion is the movement of molecules from an area of high concentration to an area of low concentration.

• Diffusion is the process of molecules moving from low concentration to high concentration.

• Diffusion is the mixing of two substances to form a solution.

• Diffusion is the separation of molecules based on size.

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What are the consequences of a cell being placed in a hypertonic solution?

• The cell will gain water and swell, potentially bursting.

• The cell will lose water, shrink, and may become dehydrated, affecting its function.

• The cell will remain unchanged as the solution is isotonic.

• The cell will absorb nutrients more efficiently.

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What is osmosis?

• The movement of solutes from an area of low concentration to an area of high concentration.

• The diffusion of water molecules through a semi-permeable membrane from an area of high concentration to an area of low concentration.

• The process of active transport of nutrients across cell membranes.

• The absorption of water by plant roots from the soil.

What is the effect of a hypertonic solution on a cell?

• Water moves into the cell, causing it to swell.

• Water moves out of the cell, causing it to shrink.

• The cell remains unchanged in size.

• The cell bursts due to excess water intake.

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In a hypotonic solution, what happens to a cell?

• Water moves into the cell, causing it to swell and potentially burst.

• Water moves out of the cell, causing it to shrink.

• The cell remains unchanged in size and shape.

• The cell becomes rigid and loses its flexibility.

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How does osmosis differ from diffusion?

• Osmosis refers to the movement of any type of molecule, while diffusion specifically refers to the movement of water.

• Osmosis specifically refers to the movement of water, while diffusion can refer to the movement of any type of molecule.

• Osmosis and diffusion are the same process and refer to the movement of water only.

• Osmosis occurs only in living cells, while diffusion can occur in both living and non-living systems.

What happens to ocean fish in freshwater?

• Ocean fish can survive in freshwater without any issues.

• Ocean fish cannot survive in freshwater because it is hypotonic to their cells, causing water to enter and potentially burst the cells.

• Ocean fish thrive in freshwater environments and reproduce there.

• Ocean fish adapt quickly to freshwater and change their physiology.

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What is turgor pressure?

• The pressure exerted by the fluid inside a plant cell against the cell wall, helping maintain its structure.

• The force that drives water out of a plant cell during photosynthesis.

• The pressure exerted by the air inside a balloon when inflated.

• The resistance of a plant to bending or breaking under weight.

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How does temperature affect the rate of diffusion?

• Higher temperatures decrease the kinetic energy of molecules, leading to a slower rate of diffusion.

• Higher temperatures increase the kinetic energy of molecules, leading to a faster rate of diffusion.

• Temperature has no effect on the rate of diffusion.

• Lower temperatures increase the rate of diffusion.

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