ANATOMY
LYMPHATIC SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The lymphocytes that kill virus-invaded and cancerous body cells and are also involved in graft rejections are the ____
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B cells
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plasma cells
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memory cells
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killer T cells
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Explanation:
Detailed explanation-1: -Cytotoxic T cells kill infected cells, whereas helper T cells help activate macrophages, B cells, and cytotoxic T cells. Effector helper T cells secrete a variety of signal proteins called cytokines, which act as local mediators.
Detailed explanation-2: -Cytotoxic T lymphocytes, natural killer (NK) cells and antiviral macrophages can recognize and kill virus-infected cells. Helper T cells can recognize virus-infected cells and produce a number of important cytokines.
Detailed explanation-3: -T cells can wipe out infected or cancerous cells. They also direct the immune response by helping B lymphocytes to eliminate invading pathogens.
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