Question

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

• A. Histamine and dopamine
• B. Histamine and kinins
• C. Interferons and opsonins
• D. Interferons and histones

Answer 1

The correct option is B Histamine and kinins

• Histamine is an organic nitrogenous compound which is involved in the inflammatory response and has a central role as a mediator of itching. Histamine increases the permeability of the capillaries to white blood cells and some proteins at the site of inflammation.
  
• Kinins are a group of substances formed in body tissue in response to injury or inflammation. They are polypeptides and cause vasodilation (increase blood flow) at the site of inflammation and smooth muscle contraction.

So, the correct answer is 'Histamine and Kinins'.