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MS (movement of substances), Water potential: Water potential is the…
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Water potential: Water potential is the measure of the tendency of water to move from one place to another.
Dilute solution
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Hence, higher water potential
Concentrated solution
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Hence, lower water potential
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Examples:
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In between
- Have to compare the solutions- eg dilute solutions
Highest
eg. pure water, distilled water
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Diffusion
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in living systems
Root hair cells are found on roots
Some mineral salts diffuse from the outside (soil) into the root hair cells
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The exchange of gases take place in the lungs
Oxygen diffuses into the red blood cell from lungs, carbon dioxide diffuses out of the red blood cells
in cells
Cells need to maintain a large surface area to volume ratio to ensure efficient exchange of materials across the cell membrane via fast diffusion.
Cells depend on the surface area of the cell membrane for diffusion of food nutrients, oxygen, waste products
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