This has been baffling me, every resource I look at says something different.
My revision guide says B cells (before differentiation) have cell surface antiobodies which bind to complementary antigens. <This along with substances (cytokines) released from T helper cells activates the B cell to divide into plasma cells (B effector) and B memory cells. The plasma cells then release specific antibodies which bind to specific antigens creating an antigen-antibody complex which T killer cells bind to and kill.
My text book says B cells (undifferentiated) have cell surface receptors, these bind to complementary antigens on pathogens, the B cell becomes an APC (antigen presenting cell). Then activated T helper cells with complementary receptors bind to the APC and produce cytokines which stimulate the B cell divison into plasma and memory B cells.
In short, DO UNDIFFERENTIATED B CELLS HAVE CELL SURFACE RECEPTORS OF ANTIBODIES?!
Biology Edexcel Unit 4 - How to B cells divide?
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