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Three ways substances cross membranes

Three ways substances cross membranes

Three-panel comparison showing diffusion down a solute concentration gradient, osmosis of water from a dilute to a concentrated solution, and active transport through a carrier protein from low to high concentration Cells take in substances such as oxygen, glucose, water and mineral ions, and remove wastes such as carbon dioxide and urea. These substances cross the partially permeable cell membrane by diffusion, osmosis or active transport.

1.4.1 Transport into and out of cells Lesson

  1. GCSE
  2. /Biology
  3. /1.4.1 Transport into and out of cells

Step-by-step lessons on Edexcel GCSE Biology 1.4.1 Transport into and out of cells. Each one builds up to exam-style questions. Start with the foundational topics and build up to the higher-tier material.

Lessons