Block C: Infection and Immunity

Question 1

Describe the innate immunity (3 marks)

Answer 1

its nonspecific, inherited and the majority of your infections go through this

Question 2

Describe the function of neutrophils

Answer 2

kill bacteria via phagocytosis

Question 3

Describe the function of eosinophils

Answer 3

releases chemicals that kill parasites

Question 4

Describe the function of monocytes

Answer 4

developing into macrophages

Question 5

Describe the function of natural killer cells

Answer 5

attack cancerous and virus infected cells

Question 6

Describe the function of mastcells

Answer 6

secrete histamine in inflammatory response

Question 7

What happens when a toll protein binds to a PAMP ligand on a pathogen

Answer 7

secondary messangers are generated, releasing cytokines

Question 8

Describe the acquired immunity (2 marks)

Answer 8

specific, requires exposure to foreign substances

Question 9

Describe the function of B cells

Answer 9

differentiates into plasma cells

Question 10

Describe the function of plasma cells

Answer 10

secretes antibodies

Question 11

Describe the function of cytotoxic T cells

Answer 11

attacks and kills cancerous and virus-infected cells

Question 12

Describe the function of helper T cells

Answer 12

activates B cells and cytotoxic T cells

Question 13

Where in the body do B cells mature

Answer 13

bone marrow

Question 14

Where in the body do T cells mature

Answer 14

thymus gland

Question 15

What’s active immunity and an example (2 marks)

Answer 15

-acquired response to antigen
-vaccination

Question 16

What’s passive immunity and a example (2 marks)

Answer 16

-direct transfer of antibodies from one individual to another (short lived because no memory cells are produced)
-breast milk