OVERVIEW OF THE IMMUNE SYSTEM
PRIMARY AND SECONDARY LYMPHOID ORGANS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Why must T-cells be present before B-cells?
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T-cells must be activated by remaining fragments/particles of the pathogen first in order to activate B-cells
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B-cells must be activated by remaining fragments/particles of the pathogen first in order to activate T-cells
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This is false ____ B-cells are activated before T-cells
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None of the above
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Explanation:
Detailed explanation-1: -Helper T cells are arguably the most important cells in adaptive immunity, as they are required for almost all adaptive immune responses. They not only help activate B cells to secrete antibodies and macrophages to destroy ingested microbes, but they also help activate cytotoxic T cells to kill infected target cells.
Detailed explanation-2: -Why is it important that B cells and T cells be activated before they can mount a response against antigen? If misdirected, the immune response can damage the body’s own tissues. So lymphocytes generally require confirmation that the antigen does indeed represent a threat.
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