Final answer:
b. Plasma cells are the B cells that do not have surface immunoglobulin; they produce and secrete antibodies in response to pathogens. Naïve B cells and memory B cells both have surface Ig, which allows them to participate in immune responses.
Step-by-step explanation:
The specific B cells that do not have surface immunoglobulin (Ig), also known as B cell receptors (BCR), are plasma cells. Naïve B cells do express surface Ig in the form of IgM and IgD, as these are the membrane-bound monomeric forms of the antibodies they express before encountering an antigen. When naïve B cells encounter an antigen and receive help from T cells, they can differentiate into plasma cells, which are the effector B cells responsible for producing and secreting antibodies into the bloodstream to neutralize pathogens.
On the other hand, memory B cells retain surface Ig which allows them to recognize and respond more rapidly upon re-exposure to the same antigen, ultimately leading to a quicker and more robust immune response.Plasma cells are the B cells that do not have surface immunoglobulin; they produce and secrete antibodies in response to pathogens. Naïve B cells and memory B cells both have surface Ig, which allows them to participate in immune responses.