Term
| In what four ways do particles move across membranes? |
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Definition
| simple diffusion, facilitated diffusion, osmosis and active transport. |
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Term
| Define concentration gradient. |
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Definition
| if the concentration of the particle is higher on one side of the membrane than the other. |
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Term
| define facilitated diffusion |
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Definition
| these channels help one type of particles to pass through the membrane, from a higher concentration to a lower concentration |
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Term
| define osmosis (very popular on exams) |
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Definition
| Osmosis is the passive movement of water molecules, across a partially permeable membrane, from a region of lower solute concentration to a region of higher solute concentration. |
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Term
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Definition
| the movement of substances across the membrane against the concentration gradient using energy from ATP. |
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Term
| Define vesicles and name their function. |
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Definition
| a small sac of membrane with a droplet of fluid inside, move materials around cell. |
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