How things cross membranes - lots of data analysis and experiment questions.
Diffusion, Active Transport, Osmosis and Facilitated Diffusion.
TIPS
Can you explain how the phospholipid bilayer stops the diffusion of water soluble compounds ?
Water potential is measured in kPA - a unit of pressure. So water moves to a lower water potential.
Can you define water potential ?
Facilitated means helped or assisted
the cellulose cell wall is permeable - but resists the expansion of the cytoplasm, therefore preventing osmotic lysis
Diffusion is moving from where there are lots to where there are few. Moving the opposite way needs energy