Disease

Question 1

Describe the response of the human body to immunisation?

Answer 1

Introduces and antigen
Production of antibodies
Production of memory lymphocytes

Question 2

What does HIV affect?

Answer 2

It kills white blood cells and eventually leads to aids.

Question 3

Describe the life cycle of a virus?

Answer 3

They infect a suitable host cell
They replicate thousands of times
They copy their genetic material
Other cells can be infected

Question 4

Why can HIV increase susceptibility to other diseases?

Answer 4

The immune system is impaired leaving you at risk of other infections.

Question 5

Describe cholera?

Answer 5

A bacterium.
Causes diarrhoea.
Spreads by contaminated water sources.
Reduce the spread by clean water supplies.

Question 6

Describe malaria?

Answer 6

A protist.
Damages red blood cells.
Mosquitoes are carriers and pass them on to humans.
Reduce by mosquito nets or insect repellent.

Question 7

Describe HIV?

Answer 7

Sexually transmitted virus spread by infected bodily fluids.
Infects and kills white blood cells and leads to aids.
Reduced by condoms or medication.