ANATOMY
LYMPHATIC SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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How does our immune system gain acquired immunity?
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T-cells always attack viruses
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Antibodies are made to recognize antigens on pathogens
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Antigens are made to recognize antibodies on pathogens
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Our body remembers the pathogens
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Explanation:
Detailed explanation-1: -B cells are formed in the bone marrow. B cells have particular sites (receptors) on their surface where antigens can attach. B cells can learn to recognize an almost limitless number of different antigens. The main purpose of B cells is to produce antibodies, which tag an antigen for attack or directly neutralize it.
Detailed explanation-2: -Antigen recognition by B cells involves direct binding of immunoglobulin to the intact antigen and, as discussed in Section 3-8, antibodies typically bind to the surface of protein antigens, contacting amino acids that are discontinuous in the primary structure but are brought together in the folded protein.
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