OCR 21st Century Science GCSE Biology B2

Revision summary for module B2 based on the GCSE revision book CGP along with answers

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  • Created by: Ohhmy
  • Created on: 13-05-11 19:50
What do antibodies do?
They fit the antigen on the MO and quickly reproduces to help neutralise it
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What do your eyes contain to help kill bacteria?
Tears that contain enzymes
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Why are you immune to most of the diseases you have already had?
The body carries a memory of what the antigen was like meaning it can quickly produce lots of antibodies if infected again
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How can microorganisms produce symptoms?
Cell damage or a release of toxins
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What are chemicals made by bacteria called?
Enzymes
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Put the following pathogens in order, largest to smallest
Fungus, Bacteria, Virus
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What is an antibiotic?
They are drugs that are able to to kill some types of pathogen without seriously damaging our own body cells
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A placebo is....
• ... a 'fake' treatment that doesn't involve a drug being given to the patient- they have no actual affect
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What are three different ways antibodies help get rid of an infection?
Mark the MO so other W. Blood cells can engulf and digest them, bind and neutralise toxins/viruses, attach to bacteria and kill them directly
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What affect does having a build up of cholesterol on the walls of your arteries have?
A narrower lumen which can restrict the flow of blood
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What is the name given to microorganisms that cause disease
Pathogens
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Other cards in this set

Card 2

Front

What do your eyes contain to help kill bacteria?

Back

Tears that contain enzymes

Card 3

Front

Why are you immune to most of the diseases you have already had?

Back

Preview of the front of card 3

Card 4

Front

How can microorganisms produce symptoms?

Back

Preview of the front of card 4

Card 5

Front

What are chemicals made by bacteria called?

Back

Preview of the front of card 5
View more cards

Comments

Cara Evans-Gillen

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Check the answers to questions 14 and 22

Chloe

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The questions were worded a bit oddly and I'm not sure some of the answers made sense but a great help for seeing what I needed to go over. Thanks a lot!!!! ;)

Mansi

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very good and helpful. 

Niksjons

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Window are mostly using in operating system file explorer windows such a good site.

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