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Transport Process (Diffusion, osmosis, and active transport (types of…
Transport Process
Diffusion, osmosis, and active transport
diffusion
random movement of particles
from area of high concentration to an area of low concentration
osmosis
diffusion through a membrane
types of membranes
completely impermeable
do not allow anything to pass through
occur as isolation barriers
deferentially or selectively permeable
allow only certain particles to pass through
includes all lipid/ protein cell membranes
freely permeable
allow all solutes to to diffuse through them
have little biological significance
intracellular transport
vesicles migrate through the cytoplasm and fuse with another organelle
short-distance intercellular transport
guard cells
transfer cells
motor cells
long distance transport: Xylem
properties of water
water transport through xylem
control of water transport by guard cells
water potential
cells and water movement
long distance transport: pholem
