Diffusion, osmosis and active transport GCSE

Diffusion

Where does diffusion occur?

How does the difference in concentration of the two substances affect the rate of diffusion?

What kind of molecules can diffuse through the cell wall?

Do particles flow in or out of the cell membrane?

What is osmosis?

What is a partially permeable membrane?

What happens if there is more water molecules on one side of a partially membrane than the other?

How does a tissue fluid demonstrate osmosis?

What happens if a cell is out of water?

What happens if the cell has lots of water?

How does a cell become turgid?

What is turgor pressure?
What is it's purpose?

What happens if a plant receives no water from the soil?

How can you investigate diffusion in a non living system? (With pH indicator phenolphthalein and agar jelly)

How can you investigate osmosis in living systems?
(Potatoes)

What should you change and keep the same in the previous experiment? (Osmosis with potato)

How can you investigate osmosis in a non living system?
(Visking tubing)

How does the visking tube a,low us to investigate osmosis?

What is active transport?

Give an example of how active transport is used in humans?

What is an example of the use of active transport in plants?

What is needed for active transport to work?

How does surface area to volume ratio affect the rate of active transport, diffusion and osmosis?

How does temperature affect the rate of osmosis, diffusion and active transport?

How does concentration gradient affect, osmosis and diffusion?
Not active transport