Changing the way you learn

Question	Answer
What is the job of our immune system?	To fight pathogens that make it past our non-specific defences.
What causes inflammation?	Extra blood being sent to the wounded area, bring white blood cells.
What is the function of white blood cells?	To destroy pathogens.
What do different types of white blood cells do?	+ ingest bacteria & digests them + make antibodies
What are antibodies?	Molecules that stick to specific pathogens.
What do antibodies do?	+ disable pathogens + label them for attack by other white blood cells.
What is pus made of?	Worn-out white blood cells, dead bacteria, & broken cells.
What are antigens?	Molecules on the surface of all cells & pathogens.
What are receptors & where are they found?	They are molecules that have the correct shape to recognise specific antigens, & are found on white blood cells.
Why does your body have to make different antibodies for different pathogens?	Each white blood cell only makes 1 type of antibody, which recognises 1 specific antigen.
What is immunity?	Where the white blood cells that made specific antibodies stay in your blood (memory cells) meaning if you are infected with the specific pathogen, the memory cells respond very quickly, before you can get ill.
Why can you get some diseases more than once?	Some diseases (i.e. common cold) are caused by many different pathogens, so new antibodies will have to be made each time. Sometimes pathogens change their antigens due to mutations.

Biology B2.2 B - Fighting back

	Created by lily bevan over 6 years ago