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5 Cards in this Set
- Front
- Back
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Define passive transport
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passive: NO energy is needed
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Define diffusion, a type of passive transport
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diffusion: movement of molecules down a concentration gradient from higher concentration to lower concentration
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How is diffusion different from osmosis? Is it passive or active?
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osmosis: passive net movement of water through a selectively permeable membrane
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Define dialysis, how is this mechanism different from diffusion?
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The separation of smaller molecules from larger molecules or of dissolved substances from colloidal particles in a solution by selective diffusion through a semipermeable membrane.
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Explain how temperature will affect the rate (speed) of diffusion
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Faster diffusion will take place if the surroundings are warmer. Increase in temperature means an increase in molecules' speed (kinetic energy). So the molecules move faster and there will be more spontaneous spreading of the material which means that diffusion occurs quicker.
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