Lymphocytes

Infectious organism trigger an inflammatory response that are attacked by ___ then…. 

Macrophages, Lymphocytes 

What do Lymphocytes effectively recognized?

A specific foreign molecule

Antigens

any molecule including a response from a lymphocytes

What are the main classes of lymphocytes?

B-lymphocytes & T-lymphocytes

Cytotoxic T lymphocytes

attack foregin cells directly

Cytotoxic T lymphocytes bind to… 

antigen-bearing cells to bring a foreign pathogen to the lymphocyte

What does Cytotoxic T lymphocytes signal cells to?

undergo apoptosis to programmed cell death

What does Cytotoxic T lymphocytes destroy?

virus-infected cells & some cancer cells 

B Lymphocytes become what?

plasma cells

What does the plasma cells secrete?

antibodies

Why do plasma cells mark cells?

the destruction by macrophages

What does B lymphocytes respond primarily to?

Bacteria & Bacterial Toxins

Natural Killer (NK) cells

do not recognize specific antigens

Where do the lymphocytes originate? 

Bone marrow 

Where do the T lymphocytes sometimes travel to?

Thymus gland

Where do B lymphocytes sometimes travel to?

Bone marrow

What are activated lymphocytes are able to recognize?

unique antigen (foreign)

Activated lymphocyte travel through bloodstream to… 

meet & bind to a specific antigen 

During activation, Lymphocyte is presented its antigen by

Macrophage or Dendritic Cell

Effector Lymphocytes

respond immediately, then die

Memory Cells

wait until the body encounters the antigen again

basis of acquired immunity

prevent subsequent infections of the same illness