Memory lymphocytes (Edexcel GCSE Biology Combined Science): Flashcards
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Memory cells role
Memory cells role
Provide long-term defence against specific pathogens
Primary infection response speed
Primary infection response speed
Slow - few lymphocytes initially make correct antibody
What lymphocytes produce
What lymphocytes produce
Antibodies to fight infection
After infection cleared
After infection cleared
Some lymphocytes remain as memory cells
Memory lymphocytes in re-infection
Memory lymphocytes in re-infection
Present & multiply rapidly
What memory lymphocytes produce quickly
What memory lymphocytes produce quickly
Large numbers of specific antibodies
Secondary vs primary immune response
Secondary vs primary immune response
Faster and more effective
Secondary response outcome
Secondary response outcome
Often eliminates pathogen before symptoms appear
When memory lymphocytes created
When memory lymphocytes created
After first exposure to pathogen
Principle behind vaccines & immunity
Principle behind vaccines & immunity
Memory cells ensure faster, stronger response