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chapter 12 (water potential (can be increased many ways (heated, put under…
chapter 12
water potential
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measured in unites of pressure, usually megapascals (MPa) or bars
the point at which the protoplast has lost just enough water to pull slightly away is called incipient plasmolysis
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diffusion, osmosis, and active transport
diffusion
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random movement of particles in solution causes them to move from areas of high concentration to low concentration
osmosis
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water molecules can pass through all membranes, but their movements are more rapid if the membrane has protein channels called aquaporins
active transport
most membranes have membrane-bound molecular pumps that use the energy of ATP to force molecules across the membrane
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