Page 95 - Teknik Menjawab Soalan PSPM Biologi

Primary and secondary immune response

Primary immune response Secondary immune response

first exposure –lag phase no

antibody is produce -memory B cell recognize the same
antigen faster
-takes 3 to 6 days for antibody to

increase -memory B cell proliferate and
differentiate rapidly into plasma cell to
-because B cell takes time to

proliferate and differentiate into produce antibody
plasma cell and memory B cell -the response is faster, concentration

-low concentration of antibodies antibodies is higher
are produce, mainly IgM is

produced -Antibody produce mainly IgG

- Antibodies increases and reach -memory B cell able to recognize

peak in ~10 days before declining antigen for longer period of time/
long lasting
-the response is short lived