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Two linked defence systems

Two linked defence systems

A pathogen is a microorganism or virus that causes disease. The immune system deals with pathogens using non-specific defences that act broadly and specific defences that target one particular antigen.

Non-specific and specific immune responses Lesson

  1. A Level
  2. /Biology
  3. /Non-specific and specific immune responses

Step-by-step lessons covering Edexcel A A Level Biology Non-specific and specific immune responses for A Level Biology. Each lesson works through exam-style questions in Paper 1, Paper 2 and Paper 3 format. 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