(immunity)

Question 1

Define first line of defence

Answer 1

Provide ‘barriers to invasion’ to prevent the entry of a microorganism. It is genetically preprogrammed and remains constant throughout life (does not contain a memory function).

Question 2

B lymphocytes

Answer 2

Plasma and memory B cell.s

Question 3

Helper T Cells:

Answer 3

interact with phagocytes to set off specific immune response

Question 4

Cytotoxic T Cells:

Answer 4

(killer cells) attack body cells which are infected by the pathogen.

Question 5

Suppressor T Cells:

Answer 5

‘suppress’ immune response once infection is defeated.

Question 6

Memory T cells:

Answer 6

remain in body for future.

Question 7

Antigen:

Answer 7

a toxin / foregin substances that induces an immune response.

Question 8

Antibody:

Answer 8

A large Y shaped protein that deactivate foreign substances, creating an antibody-antigen complex

Question 9

Macrophage:

Answer 9

White blood cells with a pattern recognition receptors. They englulf the pathogen and or antigen and transport it to the lymphnodes.