B1c

Question 1

how to prevent spread of malaria?

Answer 1

drain all stagnant water so no mosquitoes can lay eggs, spray insecticide and take lariam to kill protozoa in blood.

Question 2

what are the four different pathogens?

Answer 2

fungi (eg athletes foot)
bacterial (cholera)
viral (flu)
protozoa (malaria)

Question 3

parasite

Answer 3

the thing that causes harm to the host

Question 4

host

Answer 4

the animal or human that suffers from the disease

Question 5

vector

Answer 5

an animal that carries the micro organisms that cause the disease without suffering from the disease itself

Question 6

what is a vaccination?

Answer 6

when you are injected with a harmless PATHOGEN. the ANTIGENS it carries trigger an immune response with white blood cells producing ANTIBODIES

Question 7

describe how malaria is spread.

Answer 7

• female mosquitoes feed on human blood
• some plasmodium parasites (which cause malaria) are left in the hosts blood.
• they feed on red blood cells causing a fatal fever

Question 8

what is cancer?

Answer 8

it is a result of cells dividing out of control.
the new cells may be odd shapes and form tumours.
benign tumour cells eg warts are slow to divide and harmless.
malignant tumours are cancerous and spread throughout the body.