Question

What happens when histamine is released in the human body?

Answer 1

When histamine is released, it will interact with the histamine receptors on the cell surface or within a target cell and cause changes in bodily functions. This stimulates many smooth muscles to contract, such as the gastrointestinal tract and bronchi. In certain smooth muscles, they cause relaxation of blood capillaries which increase the flow of lymph and its protein content and lead to the formation of oedema (redness and rashes).