Which is the correct order of steps taken by B and T cells to defend against infection in body fluids and cells?
1. B and T cells move to the lymph nodes, spleen, and other parts of the lymphatic system.
2. B and T cells leave the bone marrow and thymus and move to the bloodstream.
3. B and T cells meet and begin to fight viruses or other infectious agents.
4. B and T cells develop antigen receptors.
A) 4, 2, 1, 3
B) 2, 4, 3, 1
C) 4, 3, 2, 1
D) 2, 4, 1, 3
Answer: A
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Fill in the blank(s) with the appropriate word(s).
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What will be an ideal response?
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