Diffusion: How Substances Move In and Out of Cells

What is the primary mechanism by which substances move into and out of cells?

• Active transport

• Facilitated diffusion

• Osmosis

• Diffusion

In the beaker example, what happens to the red dye particles over time?

• They form a separate layer

• They mix evenly with water

• They evaporate

• They settle at the bottom

What is the role of random movement in the process of diffusion?

• It prevents particles from mixing

• It helps particles spread out evenly

• It causes particles to settle

• It stops diffusion from occurring

How does oxygen typically move in relation to a cell during gas exchange?

• From outside to inside the cell

• It moves randomly without a net direction

• From inside to outside the cell

• It remains static

What happens to carbon dioxide during diffusion in cells?

• It does not participate in diffusion

• It moves from outside to inside the cell

• It moves from inside to outside the cell

• It remains inside the cell