During the Inflammatory Response,dilation of Blood Vessels is Caused By

Question

During the inflammatory response,dilation of blood vessels is caused by
A)nitric oxide.
B)histamine.
C)cytokines.
D)phagocytes.
E)both histamine and nitric oxidE.

Accepted Answer

Both histamine and nitric oxide can cause dilation of blood vessels during the inflammatory response. Histamine is released by mast cells and causes immediate dilation of local blood vessels. Nitric oxide is produced by endothelial cells and causes a more sustained dilation of blood vessels. Both of these actions increase blood flow to the affected area, allowing for more immune cells to reach the site of infection or injury.