Which cells secrete histamines that trigger inflammatory pathways? which cells secrete histamines that trigger inflammatory pathways? neutrophils mast cells nk cells macrophages?

The correct answer is: mast cells.

Mast cells are a type of white blood cells which contains granules rich in histamine. Histamine is released through degranulation and it is a mediator of the inflammatory response (for example, allergic inflammation). It acts by increasing the permeability of the capillaries to white blood cells and some proteins.