While I will explain a bit about the science of stress and relaxation a little later simple way to think about it is that our body 's stress response works like a car alarm. Keep us safe by warning us of the presence of danger in our immediate environment. But instead of warning us with a loud and annoying sound,our body alarm system lets us know that something is wrong by creating changes in our neurochemistry  .If you've ever experienced pain in your stomach,periods of extreme anger, inability to focus or even insomnia  ,chances are your body was paying the price in those moments for the brain chemistry of stress. So if it's so uncomfortable,why not just get rid of stress altogether? This is not only impractical,it would be dangerous. Let's go back to the metaphor  of the car alarm. If the alarm is turned off altogether,the car is exposed to continual danger without there being any way of your knowing about it until it is too late. It would be like walking through the jungle without any fear signal in the presence of a poisonous snake or other dangerous animals -- while it might feel "nice" to be so relaxed,your body actually needs the stress response not only to remind you of danger but also to offer extra adrenaline   for your heart and extra blood  and oxygen for your arms and legs. However,if the car alarm goes off at any time,someone just looks at the car with a bit of an attitude,and it becomes equally useless. Not only do we stop paying attention to it,but it begins to drive us and everyone around us becomes a little bit crazy. In the case of our bodies,walking around in a constant state of alarm also has some pretty alarming health consequences,which we will explore in greater depth in the next chapter. Our body's stress response is compared to a car alarm in that  _  .
they work all the time they both give a signal they work in the same way they both produce a sound