The net movement of particles from a region of higher concentration to a region of lower concentration down a concentration gradient, as a result of their random movement.
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Does Diffusion require energy?
NO
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What is a concentration gradient?
Is a difference in concentration of two different substances,areas etc.
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The energy for diffusion comes from_____
-the kinetic energy (of the random movements of molecules and ion)
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List 3 things that affect the rate of diffusion
Temperature, DIstance of particles, Concentration gradient,
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How does temperature affect the rate of diffusion
Molecules have more kinetic energy at a higher temperature
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How does distance affect the rate of diffusion
The shorter the distance between particles the better (faster diffusion)-thin walls of alveoli and capilliries
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How does the concentration gradient affect the rate of Diffusion
(the bigger the better)- fater and easier
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Cell walls=capillary walls?
false, (the walls of capillary is thin because they are only one cell thick)
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Definition of Active transport
The movement of particles through a cell membrane from a region of lower water potential to a region with higher water potential. Using energy from respiration
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What is the importance of diffusion of gases and solutes
Diffusion of gases is what makes gas exchange possible. Diffusion of plant cells is what gives plants its proper shape.
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How does diffusion affect plant shape
The diffusion in the water of plant cells makes the cell turgid. Also enables plants to transpire.
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Affect of the surface are for diffusion
(the larger the better) e.g there are millions of lveoli in the lungs,giving it more surface area for the diffusion of oxygen
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Other cards in this set
Card 2
Front
NO
Back
Does Diffusion require energy?
Card 3
Front
Is a difference in concentration of two different substances,areas etc.
Back
Card 4
Front
-the kinetic energy (of the random movements of molecules and ion)
Back
Card 5
Front
Temperature, DIstance of particles, Concentration gradient,
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