PATHOLOGY MCQ
IMMUNE RESPONSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The primary immune response is much faster
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The numbers of antibodies produced in the primary response is greater
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In the secondary response the antigen is disabled in a shorter amount of time
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There is no difference between the two immune responses
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Detailed explanation-1: -In brief, when B and T-cells replicate during the primary immune response, they produce effector cells and long-lived memory cells. Memory B and T-cells are antigen-specific and, on encountering the antigen again, can mount a more rapid and effective immune response, known as the secondary immune response.
Detailed explanation-2: -Primary response appears mainly in the lymph nodes and spleen. Secondary response appears mainly in the bone marrow, followed by the spleen and lymph nodes. Both Thymus dependent and Thymus independent antigen gives primary immune response. Only Thymus-dependent antigen gives secondary immune response.
Detailed explanation-3: -Because of the generation of memory cells, the secondary immune response is faster and stronger, leading to more effective pathogen elimination in comparison to the primary immune response.