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Transport in cells - Coggle Diagram
Transport in cells
Diffusion
Diffusion is the spreading of the particles of a gas or substances in solution, resulting in a net movement of particles from a region where they are of a higher concentration to an area of a lower concentration.
Diffusion can occur in:
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Solution
Tea from a tea bag, dye in water
Through membranes
Small intestines, blood cells
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Active Transport
Active transport moves substances from a more dilute solution to a more concentrated solution (against a concentration gradient). The energy is provided by respiration.
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The minerals are at a higher concentration in the root hair cell than in the soil. So the minerals move into the cell against the concentration gradient. :
Active transport also occurs in the gut (small intestines) sugar (glucose) molecules are absorbed from lower concentrations in the gut into the blood which has a higher sugar concentrations. The glucose is used for respiration.
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Osmosis
Osmosis is the diffusion of water from a dilute solution to a concentrated solution through a partially permeable membrane.
The rate of osmosis changes depending on the concentration gradient and temperature. Partially permeable membrane - a membrane that lets some but not all substances through.
Hypertonic, isotonic, hypotonic.
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