Final answer:
Basophils are the type of leukocytes considered as mast cells that release histamine, particularly significant in inflammatory responses and allergic reactions.
Step-by-step explanation:
The type of leukocyte that is considered as mast cells and release histamine is basophils.
Basophils, like mast cells, play a critical role in the body's immune response by releasing histamine and other chemicals that stimulate the inflammatory response.
This process is especially relevant in allergies and hypersensitivity reactions, where basophils and mast cells release histamine, promoting inflammation and causing symptoms such as sneezing, itching, and increased mucus production.