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Transport across cell membranes
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Membrane structure and selective permeability

Membrane structure and selective permeability

Labelled fluid mosaic model showing phospholipid bilayer, hydrophilic heads, hydrophobic tails, channel protein, carrier protein, glycoprotein, glycolipid, cholesterol, oxygen crossing directly and sodium ion blocked A cell-surface membrane is a phospholipid bilayer with proteins, glycoproteins, glycolipids, and often cholesterol embedded in it. It is partially permeable, so its structure determines which substances cross easily.

Transport across cell membranes Lesson

  1. A Level
  2. /Biology
  3. /Transport across cell membranes

Step-by-step lessons on AQA A Level Biology Transport across cell membranes, covering Transport across cell membranes. Each one builds up to exam-style questions. Build a strong foundation in cell biology and biochemistry early on, since later topics on genetics, ecology and physiology all draw on these core concepts.

Lessons