adaptive immunity Flashcards
what is the adaptive immune system
responds slower
specific
uses specialised antibodies
what cells are involved
b cells
t cells
natural killer cells
what type of pathogens does it protect against
intracellular
what are B cells
attacks invaders outside the cells
produces antibodies that are specific
lock onto surface of an invading cell and marks it for destroying
present antigenic peptides to t cells
what are the 2 functions of t cells
helper cells
cytotoxic cells
what does a helper t cell do cd4
initiates antibody production
what does a cytotoxic t cell do cd8
have ability to kill other cells by starting apoptosis
what is a natural killer cell
a subset of T cells
eliminates tumour and virus infected cells
what are antigen presenting cells
immune cells that capture, process and present antigens to T cells
what is an antigen
a substance that draws out an immune response
examples of antigen presenting cells
macrophages
dendritic
B cells
what is passive immunity
from mother to baby
placenta
