OBJECTIVE LIFE SCIENCE
SIGNALLING IMMUNOLOGY CANCER
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Histamine dilates blood vessels in order to attract phagocytes and WBC to the area during inflammation; heparin contain anticoagulant which prevents clotting; both are produced by basophils and by mast cells
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True
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False
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -Mast cells release histamine as well as other vasoactive molecules, which cause urticaria (hives). If the antigen activates mast cells in deeper tissue, this can lead to angioedema.
Detailed explanation-2: -Mast cells play an important role in how the immune system responds to certain bacteria and parasites and they help control other types of immune responses. They contain chemicals such as histamine, heparin, cytokines, and growth factors.
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