Question

Mention the source and the role of the following in providing defence against infection in the human body:

Histamine

Answer 1

Source: Histamine is produced and stored in mast cells and basophils.

Role: Histamine plays a key role in the inflammatory response. It is released during an allergic reaction or infection, causing blood vessels to dilate and become more permeable. This allows white blood cells and proteins to enter the affected tissues and fight the infection.