GENERAL ANATOMY
IMMUNE SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The individual has encountered the pathogen already
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The individual’s macrophages are on high alert
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The individual has encountered the pathogen and has memory B cells circulating
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All of the above
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Detailed explanation-1: -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.
Detailed explanation-2: -Their function is to memorize the characteristics of the antigen that activated their parent B cell during initial infection such that if the memory B cell later encounters the same antigen, it triggers an accelerated and robust secondary immune response.
Detailed explanation-3: -A secondary immune response occurs as a result of a subsequent exposure to an antigen. It is a much more rapid and sustained response due to the action of memory immune cells.
Detailed explanation-4: -Because our memory cells are “experienced, ” we will respond to a second (or subsequent) encounter more quickly. Whereas in a primary encounter, antibodies are not generated for several days, during a memory response antibodies appear in just a few days.