Anaphylaxis is especially life threatening because it has the potential to cut off airways and breathing. What is the physiological response that allows anaphylaxis to occur? How and why does epinephrine (also known as adrenaline) counteract this response? Provide detail on the mechanism of action for this hormone.
Since this is not my area of expertise, I searched Google under the key words "Anaphylaxis epinephrine" to get these possible sources:
http://www.google.com/search?client=safari&rls=en&q=Anaphylaxis+epinephrine&ie=UTF-8&oe=UTF-8
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.