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Infection & ResponseKey Facts

Key Facts: Non-Specific Immunity

Part of Human Defense Systems - Non-specific — GCSE Biology

This key facts covers Key Facts: Non-Specific Immunity within Human Defense Systems - Non-specific for GCSE Biology. Physical and chemical barriers, white blood cell responses, inflammatory response It is section 2 of 18 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.

Topic position

Section 2 of 18

Practice

19 questions

Recall

22 flashcards

Key Facts: Non-Specific Immunity

  • Always ready: Non-specific immunity is active from birth and responds immediately
  • No discrimination: Responds the same way to all pathogens regardless of type
  • Two main lines: Physical/chemical barriers (1st line) and cellular responses (2nd line)
  • No memory: Same response every time - doesn't improve with repeated exposure
  • Rapid response: Activates within minutes to hours of pathogen detection
  • Complement specific immunity: Works alongside adaptive immunity for complete protection

Keep building this topic

Read this section alongside the surrounding pages in Human Defense Systems - Non-specific. That gives you the full topic sequence instead of a single isolated revision point.

Your Body's Security SystemFirst Line of Defense: BarriersFirst Line Defense MechanismsSecond Line of Defense: Cellular Responses

Practice Questions for Human Defense Systems - Non-specific

Which part of the body acts as the main physical barrier to prevent pathogens entering?

  • A. The skin
  • B. The lungs
  • C. The heart
  • D. The brain
1 markfoundation

Explain how mucus and cilia in the airways protect against pathogens.

3 marksstandard

Quick Recall Flashcards

What is phagocytosis?
The process by which white blood cells (phagocytes) engulf and digest pathogens or foreign particles.
What is sebum?
An oily substance produced by sebaceous glands in the skin that creates an acidic environment on the skin surface, inhibiting bacterial and fungal growth.

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Your Body's Security System

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First Line of Defense: Barriers