Human Defence Systems (OCR GCSE Biology A, Combined (Gateway Science Suite)): Flashcards
📚Flashcards
Practise the cards
14 cards from this deck
ShowHide
Practise the cards
14 cards from this deck
Non-specific defence system function
Non-specific defence system function
Prevents pathogens from entering the body
Type of barrier the skin provides
Type of barrier the skin provides
Physical barrier
What skin produces to kill pathogens
What skin produces to kill pathogens
Antimicrobial secretions
Role of skin flora
Role of skin flora
Compete with bad microorganisms for space & nutrients
Defence mechanism in the nose
Defence mechanism in the nose
Hairs and mucus trap particles
Function of cilia in trachea/bronchi
Function of cilia in trachea/bronchi
Beat to waft mucus upwards so it can be swallowed
Stomach's defence against pathogens
Stomach's defence against pathogens
Produces hydrochloric acid to kill them
Specific immune system function
Specific immune system function
Destroys pathogens that pass through non-specific defences
Key cells in specific immune system
Key cells in specific immune system
White blood cells
What is phagocytosis
What is phagocytosis
Engulfing and consuming pathogens
Function of antibodies
Function of antibodies
Bind to antigens, cause pathogens to clump together
What is an antigen
What is an antigen
Structure on pathogen surface that antibodies bind to
Why immunity occurs after reinfection
Why immunity occurs after reinfection
Antibodies produced faster, no symptoms felt - person is immune
Function of antitoxins
Function of antitoxins
Neutralise toxins by binding to them