Human defence systems (AQA GCSE Biology Combined Science): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is the key feature of non-specific defence systems?
What is the key feature of non-specific defence systems?
They work against all types of pathogens
Where in the body is lysozyme enzyme found?
Where in the body is lysozyme enzyme found?
Tears, saliva and mucus
How does lysozyme kill bacteria?
How does lysozyme kill bacteria?
By breaking down their cell walls
What does hydrochloric acid do in the stomach?
What does hydrochloric acid do in the stomach?
Kills pathogens from food and drink
Why does unbroken skin protect against pathogens?
Why does unbroken skin protect against pathogens?
It's too thick for most pathogens
What do cilia do in the trachea and bronchi?
What do cilia do in the trachea and bronchi?
Sweep mucus and pathogens to throat
How do non-pathogenic bacteria on skin help protect you?
How do non-pathogenic bacteria on skin help protect you?
They compete for nutrients
What is the function of scabs on damaged skin?
What is the function of scabs on damaged skin?
Keep pathogens out during repair
What effect does cigarette smoke have on cilia?
What effect does cigarette smoke have on cilia?
It paralyses the cilia
Why do smokers develop a 'smoker's cough'?
Why do smokers develop a 'smoker's cough'?
Mucus builds up in the lungs