Also try http://people.howstuffworks.com/fear.htm
You could also search for fear and the amygdala
The endocrine system releases chemicals into the body.
One of these chemicals is adrenaline, the "fight or flight" responce is caused by it's release.
Long term fear can do damage to the body, so techniques for overcoming fear can be learned. Education is a great way to overcome fear. sumatriptanonline.info/ will give you more information.Why---does anyone else feel like this?