How do homeostatic responses differ from stress responses ( they are asking for 1000-1500 words)

This unit is all about how stress affects the body,  I am confused as I think that stress responses are triggered by the homeostatis being disturbed in the body triggered by stress, therefore a stress response is just a knock on effect of homeostatis response, so I cant see how they are different or how I can write 1000 words about it.  

Help please!!!