science
- Created by: 10sayere
- Created on: 05-10-13 20:53
View mindmap
- Chapter 11
- Harmful micro-organisms
- Bacteria
- has a cell wall
- no nucleus
- genetic material floats around cytoplasm
- larger than a virus
- Virus
- a few genes that floar around
- smaller than bacteria
- No nucleus
- Protein coat
- Pathogens - are micro-organisms which cause disease
- Bacteria
- How diseases spread
- Pathogens can enter during sexual intercourse
- contact with infected people may spread the disease
- Immunisation
- once antibodies have fought of a disease some remain in your body
- Immunity means you cant have the same disease again
- Medical use of xrays
- high energy transverse (electromagnetic waves )
- shadow picture are images inside the body
- radio- activity
- nuclear raditation causes ionisation
- alpha beta and gamma
- film badges can monitor the exposure of a person to radiation
- nuclear raditation causes ionisation
- Harmful micro-organisms
Comments
Report