cell tansport

Question 1

concentration-number of particles in given volume (strength of solution)
concentration gradient-difference in conc. between 2 areas
diffusion-movement of particles from high-low conc.
diffusion eg.-lungs-oxygen into blood, carbon d. out of blood leaf- carbon d. into leaf, oxygen out

Answer 1

partially permeable membrane-allows some molecules to pass through (like a cell membrane)
osmosis-movement of water across a ppm from high water/low solute conc to low water/high solution conc.
osmosis eg.-water into plants roots, water in/out any cell
active transport-use engergy to move substances from low to high conc
active transport eg.-minerals being absorbed to plant roots