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Transport Processes (Short distance intercellular transport (guard cells…
Transport Processes
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Diffusion, Osmosis, and Active Transport
Diffusion is the random movement of the particles from its high concentration to the low concentration area.
Three types of membrane: freely permeable membranes allow all solutes to diffuse through them and have little biological significance. completely impermeable membranes do not allow anything to pass through and occur as isolation barriers.
Differentially or Selectively permeable membranes allow only some substances to pass through; all lipid/ protein cell membrane are differentially permeable.
Aquaporin is the protein channel in the membrane.
Active transport use the energy of ATP to force the molecules across the membrane.
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Short distance transport which involves distances of a few cell diameters.
Long distance transport between cells that are not close enough.
Isolation mechanism that inhibit movement of substances.
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