Communicable Diseases (AQA GCSE Biology): Flashcards
📚Flashcards
Practise the cards
15 cards from this deck
ShowHide
Practise the cards
15 cards from this deck
What does the non-specific defence system do?
What does the non-specific defence system do?
Prevents pathogens from entering the body
Skin's role in defence
Skin's role in defence
Acts as a physical barrier
Skin secretions that kill pathogens
Skin secretions that kill pathogens
Antimicrobial secretions
What are skin flora?
What are skin flora?
Good microorganisms competing with bad ones for space/nutrients
Nose defence mechanism
Nose defence mechanism
Hairs and mucus prevent particles entering lungs
Trachea and bronchi mucus function
Trachea and bronchi mucus function
Traps pathogens
What are cilia?
What are cilia?
Hair-like structures that beat to waft mucus upwards
Stomach defence against pathogens
Stomach defence against pathogens
Produces hydrochloric acid that kills pathogens
Specific immune system function
Specific immune system function
Destroys pathogens that pass through non-specific system
Three modes of white blood cell action
Three modes of white blood cell action
Phagocytosis, producing antibodies, producing antitoxins
What is phagocytosis?
What is phagocytosis?
Engulfing and consuming pathogens
Antibodies function
Antibodies function
Bind to antigens, cause pathogens to clump together
What are antigens?
What are antigens?
Structures on pathogen surface that antibodies bind to
What does 'immune' mean?
What does 'immune' mean?
Not feeling symptoms when reinfected with the same pathogen
Antitoxins function
Antitoxins function
Neutralise toxins released by pathogens by binding to them