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14 Cards in this Set
- Front
- Back
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What is diffusion?
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the movement of molecules form a high concentration to a low concentration
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What does it mean when a cell membrane chooses what can come in or out?
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it is selectiveley permeable
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What is starch broken down to?
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sugar
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What are molecules?
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a group of atoms held together by a chemical bond
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What causes molecules to vibrate?
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heat energy
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What does vibrate mean?
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Things move back and forth
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What is concentration?
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how close molecules are to each other
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When molecules are close together and crowded it means they are....
(high or low concentration) |
high conecntration
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What is the term that means the molecules are spread out?
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low concentration
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What are proteins broken down to?
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amino acids
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Name 2 large moleclues that won't fit through the pores of cell membrane.
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Protein and starch
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What is the result of diffusion?
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molecules become evenly spread out where there is an equal concentration everywhere. This is called equilibrium
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What kind of molecules can fit through the pores of a cell membrane?
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only small ones
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Name a few small molecules.
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amino acids, sugar, oxygen, carbon dioxide, water
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