Vocabulary List #2

Concentration gradient a change in concentration

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Unformatted text preview: concentration gradient - a change in concentration across distance (in biology, this refers to a change in concentration across the membrane) net directional membrane, where the simple diffusion -molecules crossmovement of some type of molecule across a to this type of molecule.movement is powered by the presence of a concentration gradient, and the simply because the membrane is permeable net directional of facilitated diffusion -molecules crossmovement of some type aidmolecule across a membrane, where the movement is powered by the presence of a concentration gradience, and the the membrane with the of a channel protein or a permease. net some of where the movement against a concentration gradient so the movement is powered by active transport -somedirectional movement ofsuppliedtype themolecule across a membrane, the membrane with thegoes of a permease. usable energy source by cell, and the molecules cross aid - the diffusion of solvent molecules (water molecules) towards regions of higher osmotic concentration....
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