ANATOMY
LYMPHATIC SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which response occurs on first exposure to particular antigen?
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primary
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secondary
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -The first contact that an organism has with a particular antigen will result in the production of effector T and B cells which are activated cells that defend against the pathogen. The production of these effector cells as a result of the first-time exposure is called a primary immune response.
Detailed explanation-2: -IgM is the first antibody produced in primary immune response.
Detailed explanation-3: -The induction of an adaptive immune response begins when a pathogen is ingested by an immature dendritic cell in the infected tissue. These specialized phagocytic cells are resident in most tissues and are relatively long-lived, turning over at a slow rate.
There is 1 question to complete.