Match Column – I (type of lymphocyte) with Column – II (function) and select the correct option.
| |
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| Column – I |
|
|
Column – II |
| P. NK cells |
1. Lysis of virally infected cells and tumour cells |
| Q. Helper T cells |
2. Secretion of antibodies |
| R. B cells |
3. Release of cytokines and growth factors that regulate other immune cells |
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P - 1, Q - 2, R - 3
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P - 1, Q - 3, R - 2
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P - 3, Q - 1, R - 2
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P - 3, Q - 2, R - 1
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P - 2, Q - 3, R - 1
B
Correct answer
Explanation
Natural Killer Cells (or NK cells) are a type of cytotoxic lymphocyte critical to the innate immune system. NK cells provide rapid responses to virally infected cells and respond to tumor formation.
Helper T cells help the activity of other immune cells by releasing T cell cytokines. They are essential in B cell antibody class switching, in the activation and growth of cytotoxic T cells, and in maximizing bactericidal activity of phagocytes such as macrophages.
The principal functions of B cells are to make antibodies against antigens.