pathogens and antigens (7)

Question 1

what is a pathogen

Answer 1

pathogen (germs) are disease causing infectious organisms

Question 2

what do pathogens include

Answer 2

bacteria, virus, protozoan parasite, prion, fungi, worms

Question 3

what is an antigen

Answer 3

substances that interact with the immune system, the body uses them to recognise pathogens are present

Question 4

what are the 3 levels of defence

Answer 4

“1st line, barriers
2nd line, chemical and general cellular defense
3rd line, humoral and cell mediated responses”

Question 5

what is the germ theory

Answer 5

diseases are caused by tiny germs that spread from one person to another. these germs can make you sick if they enter your body.

Question 6

what is bacteria

Answer 6

prokaryotic

Question 7

where in the body can bacteria infect

Answer 7

almost everywhere

Question 8

what type of cellular are viruses

Answer 8

non cellular pathogens

Question 9

what are viruses composed by

Answer 9

genetic material (DNA) inside a protein coat

Question 10

viruses cannot…

Answer 10

independently reproduce

Question 11

how do viruses reproduce

Answer 11

they insert genetic material into hosts cell and use the cell to replicate

Question 12

what is protozoa cells

Answer 12

unicellular eukaryotic

Question 13

what are prions

Answer 13

infectious proteins that destroy nerve cells in brain

Question 14

what is fungi

Answer 14

eukaryotic organisms

Question 15

what are worms

Answer 15

multicellular eukaryotic

Question 16

what do worms do

Answer 16

cause disease

Question 17

where do you find antigens

Answer 17

on top of pathogens