Infections Immunology RT

Question 1

Primary function of immune system?

Answer 1

.defend and eliminate foreign material- minimising damages

Question 2

Innate immune response?

Answer 2

nonspecific response - not affected by prior contact

Question 3

adaptive immune response

Answer 3

highly specific recognition and immunological memory - altered reactivity to specific antigen - more rapid response occurs with subsequent exposure.
- humoral immunity - antibodies
- cell-mediated - T cells
adaptive I r - amplify protective mechanisms - sites of antigen entry

Question 4

B lymphocyte?

Answer 4

generates diverse antibodies

Question 5

T lymphocyte

Answer 5

Secretes chemical messengers
also directly destroy pathogens, regulate nearly all other types of adaptive immune

Question 6

Plasma cell

Answer 6

secretes antibodies

Question 7

NK cell

Answer 7

destroys virally infected cells

Question 8

Innate defence against entry of micro organisms?

Answer 8

Commensal microorganisms
Physical barrier
Secretions (physical and chemical barriers)

Question 9

When barriers penetrated: mediated by:

Answer 9

Phagocytic cells:
1. Macrophage
2. Neutrophil
3. NK cells (cytotoxic for tumour or host cells infected with virus)
Complement system (alternative pathway)