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19 May, 13:06

Which of the following statements concerning immunological memory is true?

A. The memory response involves only B cells.

B. The memory response is due to production of long-lived memory cells that can respond very rapidly upon second exposure.

C. Antibodies produced in response to a secondary infection are mostly IgM.

D. The memory response is usually faster but not as strong.

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  1. 19 May, 13:23
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    Answer:Option B

    The memory response is due to long lived cells that can respond rapidly to second exposure.

    Explanation:

    Immunological memory is the ability of the immune system to quickly identify and remember an antigen from a pathogen that the body has encountered before and initiate a faster immunological response upon a reencounter with the particular antigen. This dependents on colonial selection ... The memory cells have a long life span and can remain in the body for a long time. When it encounter the antigen its previously encountered for the second time, they mobilize quickly and become plasma cells, these secrets a lot of antibodies and cause a stronger reaction to defend against such antigen in a short time.
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