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TRANSPORT PROCESSES (LONG DISTANCE TRANSPORT (XYLEM (PROPERTIES OF WATER…
TRANSPORT PROCESSES
OSMOSIS
the spontaneous net movement of solvent molecules through a selectively permeable membrane into a region of higher solute concentration, in the direction that tends to equalize the solute concentrations on the two sides.
DIFFUSION
the net movement of molecules or atoms from a region of high concentration to a region of low concentration as a result of random motion of the molecules or atoms
ACTIVE TRANSPORT
the process by which dissolved molecules move across a cell membrane from a lower to a higher concentration., require an input of energy from the cell.
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LONG DISTANCE TRANSPORT
PHLOEM
takes place in the living sieve tube cells, direction of transport in phloem is bi-directional and it is determined primarily by the nutritional requirements of the various plant organs or tissues, important component in cycling of nutrients between shoots and roots and for signaling the nutritional status of the shoots to the roots
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WATER POTENTIAL
the chemical potential of water, energy of water can be increased by heating whilke energy of water can be decrase by cooling .
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