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If a child was allergic to a substance scratched onto their skin, the area turned red and swollen within about 10 minutes. Which of the following would cause these symptoms?

  • biology -

    If a child was allergic to a substance scratched onto their skin, the area turned red and swollen within about 10 minutes. Which of the following would cause these symptoms?
    Answer
    Release of interleukin-10
    Recruitment of B cells
    Release of histamine
    The presence of flatworms
    The presence of dust mites

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    Recruitment of b cells

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