B2 Revision
- Created by: Lydia's science
- Created on: 20-10-15 13:40
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- Microorganisms
- B2 Revision
- symptoms of infectious diseases
- When inside the body microorganisms start to reproduce
- As they start to grow they damage cells, by popping them (LYSIS)
- They also produce toxins (poison)
- When the toxins reach a certain level the symptoms of the disease will appear
- They grow in the body because there is water, oxygen, food and heat
- The Immune System
- The body has an immune system to fight off invading microorganisms
- The immune system is layerd
- it has layers to make it hard for microorganisms to enter
- Neutrophils are a type of white blood cell that moves in the bloodstream looking for microorganisms
- B-Cells- white blood cell that make substances like anti bodies to fight microorganisms
- Testing drugs
- OPEN TRIALS are when both the patient and the doctor know they are using a new treatment
- Its called a PLACEBOS
- DOUBLE BLIND is when neither the doctor or patient knows the tratment
- A BLIND TRIAL is when only the doctor know which treatment is being used
- symptoms of infectious diseases
- Microorganisms are to small to see with the necked eye
- They include bacteria, viruses and fungi
- They can be beneficial however they can cause us harm
- B2 Revision
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