Diffusion and Osmosis

What is the primary difference between diffusion and osmosis?

• Diffusion involves the movement of all molecules, while osmosis specifically involves water molecules.

• Diffusion requires a semipermeable membrane, while osmosis does not.

• Osmosis involves the movement of molecules from low to high concentration, while diffusion does the opposite.

• Diffusion is driven by osmotic pressure, while osmosis is not.

Which of the following molecules can easily pass through the cell membrane without the need for transport proteins?

• Oxygen

• Glucose

• Sodium ions

• Proteins

In a hypertonic solution, what happens to a cell?

• The cell shrinks due to water moving out.

• The cell swells due to water moving in.

• There is no net movement of water.

• The cell bursts due to excessive water intake.

What role does the cell membrane play in diffusion and osmosis?

• It acts as a selectively permeable barrier controlling substance passage.

• It actively transports all molecules across the membrane.

• It prevents any movement of water molecules.

• It allows only large molecules to pass through easily.

How does osmotic pressure affect the movement of water across a semipermeable membrane?

• Water moves from an area of higher to lower water concentration.

• Water moves from an area of lower to higher water concentration.

• Water does not move across the membrane.

• Water moves equally in both directions without any net change.