GCSE level School biology notes: Explaining diffusion, osmosis, transport, active transport

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GCSE level Biology exam revision notes on material transport

INDEX of GCSE level exam revision notes on

Movement of substances in living systems - introduction to diffusion, Fick's Law, osmosis, transport and active transport

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See also Surface exchange of substances in animal organisms

and Transport systems in plants


Sub-index for this section on transport of substances in living organisms (some pages overlap)

(1) Introduction to diffusion and demonstration experiments and importance of diffusion in biology

(2) A particle model and factors affecting the rate of diffusion and Fick's Law of diffusion calculations

(3) The action of partially permeable cell membranes - selective diffusion transport and examples

(4) Osmosis, a special case of water transport, examples and explanation

(5) Some details of examples of osmotic action in an individual animal cell (blood) or a plant cell

(6) Osmosis experiments - demonstrations of osmotic action semi-permeable membrane and potato cylinders and a note on drinks and hydration of the human body

(7) Active transport of ions & molecules - explanation of what it is, why it's needed, examples explained

(8) A quick comparison table of the processes of diffusion, osmosis and active transport

See also on other pages:

Detailed notes on transport systems in plants

The human circulatory systems

Examples of surfaces for the exchange of substances in animal organisms

Enzymes - section on human digestion, metabolism and synthesis


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