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Cell membranes and transport

Cell membranes and transport

Comparison of diffusion, osmosis and active transport across a cell membrane with direction of movement and energy use labelled

Every cell is surrounded by a cell membrane. This membrane controls what enters and leaves the cell, so substances such as oxygen, carbon dioxide, water and mineral ions must cross it.

1.4 Transport across cell membranes Lesson

  1. GCSE
  2. /Biology
  3. /1.4 Transport across cell membranes

Step-by-step lessons on Edexcel GCSE Biology 1.4 Transport across cell membranes, covering 1.4.1 Transport into and out of cells and 1.4.2 Percentage gain and loss in osmosis. Each one builds up to exam-style questions. Start with the foundational topics and build up to the higher-tier material.

Lessons