Active immunity development is related to
(a) natural killer cells
(b) memory cells
(c) helper T cells
(d) suppressor T cells
Answers
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Active immunity development is related to helper T cells.
Option (C) is correct.
Explanation:
Active immunity development is related to helper T cells.
- Helper T cells are the most important cells in adaptive immunity. They are activated on the surface of antigens.
- They are required to boost the adaptive immune responses.
- They also help activate B cells to secrete antibodies and macrophages to destroy ingested microbes.
- They also help activate cytotoxic T cells to kill infected target cells.
- Helper T cells only function when activated to become effector cells.
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Answered by
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Active immunity development is related to memory cells.
- Option (b) is correct.
- B- cell and T-cell memory cells are small and resting but not stationary.
- The main task for these memory cells is to be activated again upon encounter with the same antigen and create an immune defence as soon as possible.
- T-cells are the critical cell type for an immune response to re-challenge from an antigen.
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