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11 Cards in this Set
- Front
- Back
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Diffusion
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Random movement of molecules from an area of high concentration to an area of low concentration.
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What does concentrated mean?
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tightly packed, close, little space between molecules
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What is the concentration gradient?
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High to Low
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Osmosis
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The diffusion of water across a cell membrane.
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What types of materials are transported across cell membranes?
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water, oxygen, carbon dioxide, food, waste, minerals
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What is passive transport?
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- molecules move from H to L
- no energy is used |
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What are examples of Passive Transport?
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-Diffusion
-Osmosis |
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What qualifies as Active Transport?
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- molecules move from L to H
- molecules move against the concentration gradient - energy is required |
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What is facilitated diffusion?
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Diffusion that requires a protein carrier.
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What is endocytosis?
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When cells take in materials by forming a vacuole.
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What is exocytosis?
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When cells transport materials out of a cell by a vacuole fusing with the cell membrane.
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