Human defence systems (AQA GCSE Biology): Flashcards
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Practise the cards
12 cards from this deck
What are pathogens?
What are pathogens?
Harmful microorganisms
Location of lysozyme enzyme
Location of lysozyme enzyme
Tears and saliva
Function of lysozyme
Function of lysozyme
Breaks down bacterial cell walls
Role of stomach acid
Role of stomach acid
Kills pathogens in food and drink
Most important physical barrier
Most important physical barrier
Skin
Function of mucus in airways
Function of mucus in airways
Traps pathogens
What are cilia?
What are cilia?
Tiny hair-like structures in airways
Function of cilia
Function of cilia
Sweep mucus and pathogens up to throat
Function of skin antimicrobial substances
Function of skin antimicrobial substances
Kill or stop growth of pathogenic bacteria
How helpful skin bacteria protect us
How helpful skin bacteria protect us
Produce substances that kill harmful bacteria
Purpose of scabs
Purpose of scabs
Keep pathogens out while skin repairs
Effect of smoking on cilia
Effect of smoking on cilia
Damages/paralyses them