OBJECTIVE LIFE SCIENCE
SIGNALLING IMMUNOLOGY CANCER
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Macrophages are large white blood cells that can engulf foreign substances containing antigens. Both macrophages and lymphocytes, such as T cells, appear together at the site of infection. Which statement best explains how macrophages initiate an immune response when a new antigen is first encountered?
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Macrophages incorporate the antigen into their genetic material and produce a large number of identical macrophages that are programmed to destroy that specific antigen
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Macrophages present the antigen directly to a memory B cell that produces antibodies programmed to destroy that specific antigen.
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Macrophages present the antigen to helper T cells, which activate B cells to produce plasma cells, and the plasma cells release antibodies that identify and help destroy that specific antigen
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Macrophages present fragments of the antigen to other macrophages, which are able to seek out and destroy the antigen by releasing helper T cells that engulf that specific antigen
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Explanation:
Detailed explanation-1: -Macrophages are a type of white blood cell that play an integral part in the immune system with the role of phagocytosing foreign antigens, such as bacteria. They are able to present these antigens to other immune cells, such as T-cells, for further destruction.
Detailed explanation-2: -macrophage, type of white blood cell that helps eliminate foreign substances by engulfing foreign materials and initiating an immune response. Macrophages are constituents of the reticuloendothelial system (or mononuclear phagocyte system) and occur in almost all tissues of the body.
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