B1 Biology - pathogens, fighting disease, vaccinations and drugs

Question 1

what are the micro-organisms called that enter your body and cause disease?

Answer 1

pathogens

Question 2

how does bacteria make you feel ill?

Answer 2

it damages your cells and produces toxins

Question 3

how do viruses make you feel ill?

Answer 3

they replicate themselves by invading your cells, and make many copies of themselves, the new cells will release new viruses

Question 4

what do white blood cells do?

Answer 4

they travel in your blood and attack microbes

Question 5

how do white blood cells attack microbes?

3 types

Answer 5

1. they can engulf cells and digest them
2. they produce antibodies that kill off cells
3. they also produce antitoxins

Question 6

what do injections put in to your body?

Answer 6

small amounts of inactive micro-organisms, they carry antigens that then the antibodies will attack

Question 7

what do antibiotics do?

Answer 7

they kill the bacteria without killing your body cells.

Question 8

what can’t antibiotics kill? and why?

Answer 8

viruses - they grow using your body cells which makes it difficult to destroy the viruses without killing your body cells

Question 9

what temp are micro-organisms kept at?

Answer 9

25 degrees