B5.1/B5.2 - Communicable diseases

Question 1

health

Answer 1

a state of physical and mental wellbeing
-not just absence of illness

Question 2

communicable disease

Answer 2

-caused by pathogens
-can be passed on

Question 3

eg of communicable diseases

Answer 3

-TB
-Flu

Question 4

non-communicable disease

Answer 4

-cannot be passed on

Question 5

eg of non-communicable diseases

Answer 5

-heart disease
-diabetes

Question 6

Factors affecting health

Answer 6

-diet
-bad nutrient = diabetes
-not enough nutrients - anaemia
-stress
-environmental factors

Question 7

How health problems interact

Answer 7

-viruses can change dna
-refects in immune system
-immune reactions can trigger allergies

Question 8

pathogens

Answer 8

micro organisms that cause disease

Question 9

eg of pathogens

Answer 9

-fungi
-bacteria
-viruses
-protists

Question 10

In plants most common pathogen is

Answer 10

-protists
-fungi

Question 11

bacteria

Answer 11

-single-celled living organisms
-commonly useful
-minority = pathogens = harmful

Question 12

viruses

Answer 12

-even smaller
-regular shaped
-causes disease in every organism
always harmful

Question 13

how do bacteria grow/damage

Answer 13

-binary fission
-divide rapidly
-produce toxins and attack body cells

Question 14

how do viruses attack

Answer 14

-live + reproduce inside of cells
-destroy cells

Question 15

How pathogens are spread: by air

Answer 15

-pathogens travel in air and are inhaled
-droplet infection
-coughing or sneezing

Question 16

How pathogens are spread: by direct contact

Answer 16

-plants = infected crop passes on infection to entire field
-humans = stds due to contact of skin

Question 17

How pathogens are spread: by water

Answer 17

-plants = fungal spores in water
-humans = contaminated water = pathogen enters via digestive system