Which part of the adaptive immune response involves b cells?

Humoral immunity

Explanation:

Adaptive immunity is of two types: cell-mediated immunity and antibody-mediated immunity. Antibody-mediated immunity includes B cells. The function of B cells is to transform into plasma cells which in turn form antibodies. Antibodies are also called immunoglobulins and bind with a specific antigen to generate an immune response. Body fluids or humor include blood and lymph. Since the antibodies bind to the antigens in body fluids (blood and lymph), the antibody-mediated immunity is also called humoral immunity.

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-lavira: )