Chapter 5 - Communicable Disease Flashcards
What is a communicable disease?
A disease caused by pathogens.
Give an example of a type of disease caused by malnutrition.
One from: deficiency disease, obesity, cardiovascular disease, type 2 diabetes, cancer.
How do viruses make you feel ill?
Viruses damage and destroy cells (when they reproduce inside them).
What is ‘droplet infection’?
Infection of an individual when they inhale droplets of water containing a pathogen, that have been coughed or sneezed out by another person.
Why do industrial laboratories use 35°C instead of 25°C as in schools?
The bacteria will multiply at a faster rate at the higher temperature, speeding up the industrial process.
How do you make sure that unwanted microorganisms do not contaminate a pure culture of bacteria?
Heat / sterilise the equipment, boil solutions, cover Petri dishes or flasks.
If a bacterium has a mean division time of 20 minutes, how many bacteria would there be after 3 hours, starting with 1 bacterium?
256.
Why did it take a long time for other doctors to accept the ideas of Semmelweis?
No one knew about bacteria and viruses.
Why is it not possible to vaccinate plants?
Plants do not have an immune system.
How can doctors prevent measles?
By vaccination.
What causes a plant with TMV to die?
The leaf cells are destroyed so they cannot photosynthesise.
Why should chicken be cooked thoroughly?
To kill all the salmonella bacteria.
What is meant by ‘STD’?
Sexually transmitted disease.
What is inside a plant gall?
New, undifferentiated, genetically modified cells (unspecialised cells).
Which part of the plant is affected by black spot?
The leaves
