energy flow and food webs Flashcards
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what is cell transport
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movement of material across the membrane
2
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cell membrane
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- made of phospholipids
- selectively permeable
3
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what does selectively permeable mean
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some things can/cant go through
3
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what is polarity
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unequal distribution of charge
4
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what can make it through the cell membrane
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- small, not charged, not polar
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