When TSH reaches a very high level, What does it do?
A- causes TRH to be released
B- causes thyroxine to be released
C- turns off TRH production
D- turns off thyroxine production
E- turns off TSH production
Since this is not my area of expertise, I searched Google under the key words "high tsh symptoms" to get this:
http://www.google.com/search?client=safari&rls=en&q=high+tsh+symptoms&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/.