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

Q. 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 opsonin

(d) Interferons and histones

Solution : Correct option : B An insect bite may result in inflammation of that spot. This is triggered by the alarm chemicals such as histamine and kinins. They both are involved in the inflammatory response. Histamine increases the permeability of the capillaries to white blood cells and some proteins, to allow them to engage pathogens in the infected tissues .Kinins are proteins in the blood that cause inflammation and affect blood pressure (especially low blood pressure) by increasing the blood flow throughout the body. So, the correct answer is ‘Histamine and kinins’.