Place the following events in activation of a b cell by a microbe in the order in which they would occur.
several rounds of division occur, producing many b cells that all express the same b cell receptor.
a b cell differentiates from a lymphocyte stem cell, and the mature b cell expresses a specific type of b cell receptor on its cell membrane.
the b cell's bcr (b cell receptor) binds to a foreign antigen with high specificity and high affinity.
second messenger signaling is activated in the b cell.
gene expression is altered in the b cell, and the b cell begins to divide.