During a humoral immune response to a newly encountered bacterial infection,B cells are first stimulated to proliferate and then secrete antibodies specific for the bacterium.The antibodies may then bind to the bacteria and facilitate ingestion of the microbes by phagocytic cells.In what phase of the humoral immune response does the binding of secreted antibodies to bacteria occur?
A)Recognition phase
B)Activation phase
C)Effector phase
D)Homeostatic phase
E)Memory phase

Question

Quizplus · Accepted Answer

The effector phase of an immune response occurs when cells or molecules eliminate the microbe or microbial toxin.In a humoral immune response,the effector phase includes secretion of antibody,binding of the antibody to the microbe or toxin,and subsequent antibody-dependent elimination of the microbe or toxin.The recognition phase is the initial binding of the antigen by the naive lymphocyte.The activation phase includes proliferation and differentiation of lymphocytes in response to antigen recognition.The homeostatic phase follows the effector phase,during which the response wanes.In the memory phase,memory B cells and antibodies secreted by long-lived antibody-secreting cells are "waiting" for a repeat exposure to the microbe.

During a Humoral Immune Response to a Newly Encountered Bacterial