MISCELLENOUS
VACCINATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Histamines directly cause:
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Helper T cells to mark pathogens for destruction
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Cytotoxic T cells to become activated
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B and T cells to create memory cells
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Blood vessels to dilate and leak fluid and WBC’s
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Explanation:
Detailed explanation-1: -As part of an immune response to foreign pathogens, histamine is produced by basophils and by mast cells found in nearby connective tissues. Histamine increases the permeability of the capillaries to white blood cells and some proteins, to allow them to engage pathogens in the infected tissues.
Detailed explanation-2: -In a surprise finding, scientists have discovered that histamine, the inflammatory compound released during allergic reactions that causes runny nose, watery eyes, and wheezing, can be produced in large amounts in the lung by neutrophils, the white blood cells that are the major component of pus.
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