c39 final

Question 1

what is the main function of B cells

Answer 1

to produce antibodies

Question 2

where are antibodies present

Answer 2

in the blood, lymph, and extracellular fluids

where they bind to extracellular bacteria and viral particles

also found at mucosal surfaces

Question 3

how are B cells activated?

Answer 3

multiple surface B cell receptors bind to the same antigen and this causes B cell receptors (BCRs) to cluster together … this clustering and CROSS linking sending activation signals into the B cell

Question 4

antigen interactions with IgM-BCRs on a B cell surface bring multiple BCRs close together

Answer 4

cross linking

this allows for signalling cascades to proceed and induce activation