28 - The Need for an Immune System

Question 1

define immune syst?

Answer 1

passive and active processes to protect body against harm

Question 2

prophylactic and therapeutic function of IS?

Answer 2

Prophylactic
- prevent trouble developing

Therea
- sort problem out [cost of friendly fire]

Question 3

why is IS decribed as policeman and discriminating?

Answer 3

police
- protect cells from foreign invaders

discrim
- between self cells and non self

Question 4

what are the 3 systems of the immune system?

Answer 4

intrinic - prevent prob develop [barrier]

innate - recognise nonself NON-SPEC

adaptive - recognise nonself SPEC

Question 5

where are immune cells made and then stored?

Answer 5

made in bonen marrow
t cells specialise in Thymus
store in spleen

Question 6

3 factors immunity depends on?

Answer 6

correct no of cells [problem: neuropaenia/lymp]

able to travel to correct site? [poor vascularisation]

cells have appropriate molecules to kill [tubercloid]

Question 7

how does the immune system kill by either being

• contact dependent
• soluble factors?

Answer 7

contact dep

• engulf
• communicate to co-ordinate response

sol fac

• immune cells prod sol factors to kill directly
• mols can regulate IS

Question 8

what produces antibodies?

Answer 8

b-plasma cells

Question 9

how do antibodies work by

• neutralization
• opsonization
• complement activation

Answer 9

N
-neutralise bacteria bind to it

O
- label pathogen to macrophages

C
- kills straight