Human Defence Systems (OCR GCSE Biology A, Combined (Gateway Science Suite)): Quizzes
📚Quizzes
Practise the questions
13 questions from this quiz
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Practise the questions
13 questions from this quiz
What is the purpose of the non-specific defence system?
What is the purpose of the non-specific defence system?
To prevent pathogens entering the body
What does the skin produce to kill pathogens?
What does the skin produce to kill pathogens?
Antimicrobial secretions
How does skin flora protect the body?
How does skin flora protect the body?
Competes with bad microorganisms
How does the nose prevent pathogens entering the lungs?
How does the nose prevent pathogens entering the lungs?
Hairs and mucus trap particles
What do cilia do in the trachea and bronchi?
What do cilia do in the trachea and bronchi?
Beat to waft mucus upwards
How does the stomach kill pathogens?
How does the stomach kill pathogens?
Produces hydrochloric acid
What is a key part of the specific immune system?
What is a key part of the specific immune system?
White blood cells
What is phagocytosis?
What is phagocytosis?
Engulfing and consuming pathogens
Where are antigens found?
Where are antigens found?
On the surface of pathogens
How do antibodies bind to pathogens?
How do antibodies bind to pathogens?
They are complementary to antigens
What happens when antibodies bind to pathogens?
What happens when antibodies bind to pathogens?
Pathogens clump together
What happens if you're infected again with the same pathogen?
What happens if you're infected again with the same pathogen?
Antibodies produced at a faster rate
How do antitoxins protect the body?
How do antitoxins protect the body?
Neutralise toxins by binding to them