Term
| What does selectively pearmeable mean? |
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Definition
some substances can pass through while others cant. |
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Term
| Explain the comparison between the cell membrane and the gatekeeper |
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Definition
| They are the same thing because the both let some things get through and some not. |
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Term
| What substances are pearmeable through the cell membrane? |
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Definition
1) oxygen 2) water 3) carbon dioxide |
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Term
| What substances are not pearmeable through a cell membrane? |
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Definition
| large molecules and salts |
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Term
| What are the 3 methods by which substances can move into and out of a cell? |
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Definition
1) diffusion 2) osmosis 3) active tansport |
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Term
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Definition
| Process in which molecules tend to move from an area of high concentration to an area with low concentration |
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Term
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Definition
| molecules move and bump into eachother and sometimes there are a lot in one area. they have to move out of the area if it gets too packed. |
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