Properties of adaptive immunity Flashcards Preview

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Flashcards in Properties of adaptive immunity Deck (11)
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1
Q

Major characteristics of adaptive immune system

A
  1. Immense diversity of lymphocytes and receptors
  2. Self tolerance, lack of reactivity against an animal’s own molecules
  3. B and T cells proliferate after activation
  4. Immunological memory
2
Q

What does the immunoglobulin gene (Ig) encode

A

One chain of the B cell receptor

3
Q

How are new chains produced

A

Can be produced from the same gene using recombination of DNA

4
Q

How are antigen receptors formed

A

The rearranged DNA is transcripted and translated

5
Q

Specificity of b and t cells

A

Adaptive immunity is specialized immunity for particular pathogens

6
Q

Origin of self tolerance

A

As lymphocytes mature in bone marrow or the thymus they are tested for self reactivity

7
Q

What happens to t and b cells with receptors specific for their own body’s molecules

A

They are destroyed by apoptosis or rendered nonfunctional

8
Q

What is the purpose of immunological memory

A

Long term protection against disease

9
Q

Primary immune response

A

The first exposure to a specific antigen

10
Q

What happens to t and b cells during the primary immune response

A

Selected t and b cells give rise to their effector forms

11
Q

Secondary immune response

A

Memory cells facilitate a faster, more efficient response (more force, you may not even know you were affected by the pathogen again)