Question
Biology Question on Immune System
An insect bite may result in inflammation of that spot. This is triggered by the alarm chemicals such as
histamine and dopamine
histamine and kinins
interferons and opsonin
interferons and histones
histamine and kinins
Solution
An insect bite may result in inflammation of that spot. This is triggered by the alarm chemicals such as histamine and kinins. (i) Histamine: It is a chemical present in many cells of the body especially in mast cells in connective tissue, circulating basophils and blood platelets. Histamine is released in direct response to the injury of cells that contain it and by complement system. (ii) Kinins: Kinins are another group of substances that cause vasodilation and increase the permeability of blood vessels. Kininis are present in blood plasma.