Communicable Disease 2 - Viruses
This lesson covers:
- What viruses are
- How viruses spread
- Examples of viral diseases
Are viruses living organisms?
Yes
No
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Are viruses made of cells?
Yes
No
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Viruses are about 10,000 times __________ than animal or plant cells.
smaller
larger
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How viruses spread and multiply
spread / food / infect / virus / cells
- Viruses can pass between humans via the air, contaminated or water, or by direct contact.
- As they can't reproduce themselves, viruses have to enter one of our , and then use it to create multiple copies of the virus itself.
- Once there are lots of copies, the viruses cause the cell to burst, and then go on to neighbouring cells.
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How can measles be spread between people?
Via direct contact
Via droplets in air when an infected person coughs or sneezes
Via contaminated food
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What are the symptoms of measles?
(Select all that apply)
Red skin rash
Compromised immune system
Fever (feeling hot and cold)
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In the UK, are most people are vaccinated against measles?
Yes
No
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HIV stands for Human Immunodeficiency Virus.
This is because it affects humans, it weakens the immune system (immunodeficiency), and it is a virus.
Which two ways can HIV be spread between people?
Sexual contact
Coughing or sneezing
Exchange of bodily fluids
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Infection with the HIV virus can lead to __________. This is where the immune system is so weak that the person can catch unusual infections.
AIDS
SDIC
SIDS
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What is the treatment for HIV/AIDS?
Kidney transplant
Antiretroviral drugs
Statins
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What type of organism does Tobacco Mosaic Virus (TMV) infect?
Animals
Bacteria
Fungi
Plants
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What is the main symptom of Tobacco Mosaic Virus (TMV)?
Patches of the leaves get discoloured
Roots start to die
Leaves turn black
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Tobacco Mosaic Virus (TMV) reduces the amount of photosynthesis that a plant can do.
What are the consequences of this?
(Select all that apply)
The plant won't be able to grow as well
The plants leaves will turn purple
The plant won't be able to produce as many sugars
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