Question

Mast cells contain histamine and other vasoactive amines important in the inflammatory response. When mast cells release these mediators, what is the response in the body?

1) Vasodilation and increased vascular permeability
2) Inhibit kinin from becoming bradykinins
3) Initiate the coagulation cascade
4) Trigger cytokines to down-regulate inflammation

Answer 1

When mast cells release histamine and other vasoactive amines, the response in the body is vasodilation and increased vascular permeability.

Step-by-step explanation:

When mast cells release histamine and other vasoactive amines, the response in the body is vasodilation and increased vascular permeability. Histamine causes the widening of blood vessels, resulting in increased blood flow and redness. It also increases the permeability of capillaries, allowing plasma to leak out and causing swelling. These responses are part of the inflammatory response that helps to defend against infection and injury.