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Three ways substances cross cell membranes

Three ways substances cross cell membranes

Three-panel comparison of diffusion, osmosis and active transport across a membrane

A cell membrane is the thin boundary that controls what enters and leaves a cell. Particles move randomly all the time, so substances can cross membranes in predictable ways.

Movement of substances into and out of cells Lesson

  1. IGCSE
  2. /Biology
  3. /Movement of substances into and out of cells