Biology - Infection & Response

?
Pathogens - A pathogen is a microorganism that causes a disease. The 4 main types are: viruses, pathogens, fungi and protists
All types of pathogen have a simple life cycle. They infect a host, reproduce themselves or replicate if it is a virus, spread from their host and infect other organisms. They are transmitted via direct contact, air, water, unhygienic food prep etc
1 of 5
Viruses are not alive because they do not complete all of the seven life processes: Movement, Respiration, Sensitivity, Nutrition, Excretion, Reproduction and Growth.
Some examples of viral diseases are tobacco mosaic virus, HIV (potentially leading to aids) and measles.
2 of 5
Not all bacteria are pathogens which cause disease. Many bacteria, like those found in the intestines, are useful. All bacteria are prokaryotes, and do not have a nucleus, They are cells and so are larger but cannot be seen without a microscope
Some examples of bacterial diseases are gonorrhoea and salmonella
3 of 5
Protists are a group of microorganisms that have features that belong to animals, plants and fungi. Some are like animals, others more like plants and some, called moulds are closest to fungi. They are all eukaryotic, which means they have a nucleus.
Malaria is spread by mosquitos which carry the Plasmodium protist. These are often found in areas with higher temperatures like Africa, Asia, and South and Central America, but not the UK. Mosquitos **** blood containing the protists.
4 of 5
Not all fungi cause disease. Yeast is a single-celled fungus that is economically important because we use it to make some bread and beer. Not all fungi are single-celled. Some such as mushrooms are multicellular and so much larger.
Biology
5 of 5

Other cards in this set

Card 2

Front

Some examples of viral diseases are tobacco mosaic virus, HIV (potentially leading to aids) and measles.

Back

Viruses are not alive because they do not complete all of the seven life processes: Movement, Respiration, Sensitivity, Nutrition, Excretion, Reproduction and Growth.

Card 3

Front

Some examples of bacterial diseases are gonorrhoea and salmonella

Back

Preview of the back of card 3

Card 4

Front

Malaria is spread by mosquitos which carry the Plasmodium protist. These are often found in areas with higher temperatures like Africa, Asia, and South and Central America, but not the UK. Mosquitos **** blood containing the protists.

Back

Preview of the back of card 4

Card 5

Front

Biology

Back

Preview of the back of card 5

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Infection and Response resources »