B2 Biology Triple Award Revision
- Created by: pixar
- Created on: 30-04-15 10:05
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- Virus
- a virus attaches to a body cell and replicate themselves using the cells machinery into that body cell
- The cell damage is what makes you feel ill
- The cell then bursts releasing the virus into the blood to infect more cells
- B1 Revision
- Bacteria
- very small cells that reproduce rapidly inside the body
- The make you feel ill by:
- Damaging your cells
- Releasing toxins (poisons) into the blood
- Bodies defence system
- Skin, hairs and mucus stop a lot of nasty bacteria entering your body
- platelets help the blood clot quickly to prevent microorganisms from entering the blood
- Sometimes microorganisms do get into your body
- This is when the immune system kicks in
- The most important part are the white blood cells
- These cells attack any bacteria by:
- 1) engulf and digest the foreign cells
- 3) Producing anti-toxins to eliminate the toxins from the bacteria
- 2) producing proteins(antibodies) to attack the bacteria
- The antibodies produces are specific to a type of bacteria
- antibodies are rapidly produced to spread around the body quickly
- These cells attack any bacteria by:
- The most important part are the white blood cells
- This is when the immune system kicks in
- Bacteria
- a virus attaches to a body cell and replicate themselves using the cells machinery into that body cell
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