IGCSE Biology Specification

Edexcel 4BI1

Section 2: (d) Movement of substances into and out of cells

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#2.15

understand the processes of diffusion, osmosis and active transport by which substances move into and out of cells

#2.16

understand how factors affect the rate of movement of substances into and out of cells, including the effects of surface area to volume ratio, distance, temperature and concentration gradient

#2.17

practical: investigate diffusion and osmosis using living and non-living system