11. Human Defences Against Diseases Flashcards
1
Q
The immune system:
A
If a pathogen enters the body, the immune system tries to destroy it.
WHITE BLOOD CELLS help defend again pathogens.
2
Q
Preventing entry of pathogens:
A
Stomach - glands produce acid which kills bacteria in food.
Skin - glands produce sebum which kills bacteria and fungi.
3
Q
What is phagocytosis?
A
Blood cells helping defend against pathogens which involves the pathogen being surrounded by antibodies.
Antibodies is a special protein molecule.
4
Q
Boosting immunity:
A
When someone gets a VACCINATION, small amounts of dead or weak pathogens are injected into the body. This helps white blood cells produce specific antibodies to fight of the disease.
