OBJECTIVE LIFE SCIENCE
SIGNALLING IMMUNOLOGY CANCER
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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When cytotoxic T-cells enter circulation they search for antigen displaying cells, attack and destroy the antigen directly by:
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injecting antibodies
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injecting perforin
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secreting lymphokines which attract neutrophils, eosinophils, macrophages
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secretion of monokines that signal the lymphokines to destroy the pathogen
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Explanation:
Detailed explanation-1: -Cytokine Secretion Cytokines are substances that activate other cells. Cytotoxic T cells release two cytokines in particular, TNF-alpha and IFN-gamma, which facilitate the activation of macrophages. The macrophages attack and clean up infected cells and prevent unregulated cell growth such as that of a tumor.
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