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Question

An insect bite may result in inflammation of that spot. This is triggered by alarm chemicals such as


A

Interferons and opsonin

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B

Histamine

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C

Histamine and dopamine

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D

Interferons and histones

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Solution

The correct option is B

Histamine


Inflammation is the body's way of self-protection. When inflammation occurs, chemicals like histamine are released from the body's mast cells. Histamine increases blood flow to the area and the leakage of fluid and proteins from the blood into the tissue space. Thus, the quick release of histamine produces the redness and swelling associated with inflammation.

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