Question

what is histamine?explain it in detail
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Answer 1

Answer:

biologically active substance found in a great variety of living organisms. It is distributed widely, albeit unevenly, throughout the animal kingdom and is present in many plants and bacteria and in insect venom. Histamine is chemically classified as an amine, an organic molecule based on the structure of ammonia (NH3). It is formed by the decarboxylation (the removal of a carboxyl group) of the amino acid histidine.

Answer 2

Answer:

a compound which is released by the cells

Explanation:

this means an cell released compound and allergic and any in inflammatory reaction,

causing contractions in smooth muscles and dilation of capillaries