B3a communicable disease

Question 1

what is a communicable disease?

Answer 1

a disease that can be passed from one organism to another

Question 2

what are the three ways communicable diseases can be passed on?

Answer 2

direct contact, water or air

Question 3

what is an antigen?

Answer 3

proteins found on pathogens

Question 4

how does the skin defend the body from pathogens?

Answer 4

1. acts as a physical, waterproof barrier
2. scabs made from platelets
3. glands produce antimicrobial secretions to kill pathogens

Question 5

how does the stomach defend the body from pathogens?

Answer 5

stomach acid kills most pathogens taken in by food or drink

Question 6

how does the nose defend the body from pathogens?

Answer 6

nasal hairs and sticky mucus prevent pathogens entering through the nostrils

Question 7

how do the trachea and bronchi defend the body from pathogens?

Answer 7

lined with mucus to trap pathogens
cilia (hair like structures) waft to move the mucus up the throat to be swallowed

Question 8

name 3 diseases caused by viruses

Answer 8

1. measles
2. HIV
3. tobacco mosaic virus (TMV)

Question 9

name 2 diseases caused by bacteria

Answer 9

1. salmonella
2. gonorrhoea

Question 10

name a disease caused by a protist

Answer 10

malaria

Question 11

name a disease caused by a fungus

Answer 11

rose black spot