IMMUNE RESPONSE
CLASSICAL ALTERNATE AND LECTIN PATHWAYS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What first happens to a B lymphocyte when it becomesactivated?
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It divides by mitosis producing a clone of cells.
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It begins transcription and produces antigens.
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It differentiates into memory cells.
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It produces antibodies using its extensive rough endoplasmic reticulum (rER).
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Explanation:
Detailed explanation-1: -B cells are activated when chemicals are released from T helper cells. They are also activated when the antibody molecules on their cell surface bind to a complementary antigen. Different B cells have different shaped antibodies on their surface, so only the B cells with the correct-shaped antibodies will be activated.
Detailed explanation-2: -Activation means that the B lymphocyte divides to form one of two types of daughter cells; activated plasma cells or inactive memory cells. Memory cells have longer lifespans and will recognize the same antigen should it attack at a later date. Plasma cells respond immediately through the release of antibodies.
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