Cell Recognition & the Immune System (AQA A-Level Biology): Flashcards
📚Flashcards
Practise the cards
10 cards from this deck
ShowHide
Practise the cards
10 cards from this deck
What is humoral immunity?
What is humoral immunity?
Immunity using antibodies in blood plasma & tissue fluids
Where do antibodies circulate?
Where do antibodies circulate?
Blood plasma and tissue fluids throughout the body
Antibody-antigen binding mechanism
Antibody-antigen binding mechanism
Lock & key - antibody fits one specific antigen perfectly
What is clonal selection?
What is clonal selection?
Rapid mitosis creating clone of B cells all producing the same specific antibody
What is the function of plasma cells?
What is the function of plasma cells?
Secrete antibodies into blood plasma and tissue fluids
Plasma cell antibody production rate
Plasma cell antibody production rate
Approx. 2000 antibodies per second
Memory cell lifespan
Memory cell lifespan
Decades; some survive entire lifetime
Do memory cells produce antibodies in resting state?
Do memory cells produce antibodies in resting state?
No - they do not actively produce antibodies
Primary vs secondary immune response speed
Primary vs secondary immune response speed
Primary: days-weeks. Secondary: within days (much faster)
Secondary response antibody levels
Secondary response antibody levels
Significantly higher than primary response